Sweden.Hässleholm · two crewmen see a metallic object below their DC-3

On the afternoon of Thursday, December 17, 1953, a DC-3 of Transair Sweden was flying from Bulltofta airfield in Malmö to Bromma in Stockholm along the civil air corridor, on autopilot. It was commanded by the company's chief pilot, Captain Ulf Christiernsson, who according to Dagens Nyheter was then flying the Stockholm morning papers to the south of the country; the only other person on board was the flight mechanic Olle Johansson, in the right-hand seat of the cockpit. Christiernsson had served as a volunteer in the RAF from 1942 to 1946 and had flown about thirty missions from North Africa and Italy. The time is not certain: the US air attaché's report gives 14:37 Swedish time and the Blue Book card 13:37 universal time, which is the same, but in the CIA translation of Dagens Nyheter the official communiqué places the sighting at 14:57 and the paper at about 15:00.

Over Hässleholm, in Scania, Christiernsson saw to his right and somewhat ahead a narrow silhouette that he took for a jet, approaching very fast, below the aircraft and in the opposite direction. As it came closer it looked symmetrical and metallic, "a flying lozenge" in the translation of his statement to the paper, and as it passed almost beneath the aircraft he saw it as nearly round, only slightly elliptical. He said he saw it for four to five seconds, until it disappeared under the wing or the nose; the mechanic, with a better view downwards and aft, followed it for about five seconds more. Johansson described an ellipse with sharp outlines, between silver and white, seen for about ten seconds, coming from the north at about 1,200 km/h. The DC-3 was at 2,150 meters and about 270 km/h; the cloud layer reached about 1,500 meters and the object, they said, passed just above it, between 1,500 and 1,600 meters. They put it at about 10 meters across and at the speed of sound, comparing it with J 29 fighters and with an SAS DC-4 that, according to Dagens Nyheter, they passed ten minutes later (the La Provincia translation says ten minutes earlier). They saw no flame, smoke or trail, and ruled out a meteor. They reported at once to the F 5 air base at Ljungbyhed and to civil air traffic control at Bulltofta.

That same day the Swedish Defence Staff issued a communiqué: the crew of a civil aircraft had seen near Hässleholm an unknown object moving in the opposite direction for six or seven seconds; at that altitude the weather was clear; because of the low cloud it was not thought to have been visible from the ground; the Defence Staff knew of no Swedish aircraft in the area, and "An investigation is being conducted". Swedish radio read it at 18:00, wrongly saying six or seven minutes, and corrected it at 22:15 Swedish time in the broadcast whose transcript, taken down by a radio monitoring service, is in the Blue Book file. The Air Force commander, General Bengt Nordenskiöld, said it had not been any Swedish aircraft and that what the radar stations might have picked up was being checked.

On December 19, according to Dagens Nyheter, the experts leaned toward a daylight meteor, an idea of the astronomer Bertil Lindblad of the Lund observatory, who linked it to the Geminids: at that time of day, he said, their meteors came in almost parallel to the ground, at about 3° and from north to south, "which also seems to agree with the observations made". Captain Källenius of the Defence Staff did not rule out a propaganda or weather balloon from Germany or Denmark, and warned that even experienced observers misjudge the speed of an object that appears suddenly; he added that "if a balloon prior to its observation had soared to a great altitude, it might have lost some of its gas, giving it a flat form". A member of the Air Staff told the paper that these observations over Scania were "the clearest and most detailed which heretofore have been made". Some took it for a prank by the pilot; the Defence Staff did not, and Christiernsson replied: "To be sure, I joke a bit, but one does not joke about things like this". On December 20 the paper reported that Bertil Dahlström, director of a Malmö perfume firm, had released more than 300 colored balloons, 15 to 30 centimeters across, between 12:00 and 13:00 that same day at Äsphult, on the Linderödsåsen ridge, about 20 kilometers south of Hässleholm (our own calculation from the map). According to Dahlström, the balloons ought to rise "1,000 meters and maybe still higher", and cards had already come back from finders in Hässleholm, from which the paper inferred that the winds had carried them to the place of the sighting. As of Saturday evening the Air Staff still knew nothing of those balloons. The paper concluded that the balloon theory had been strengthened, while admitting that whether such small balloons could take on the appearance and size described could not be said without detailed calculations.

On January 13, 1954, Major Burt Rowen, the US assistant air attaché in Stockholm, sent report IR-12-54, approved by Lieutenant Colonel Herbert J. Rogers, with the translation of the pilot's interview, the communiqué and a character sketch of Christiernsson. A source in the Royal Swedish Air Board whom the report calls "extremely reliable", born in the same town as the pilot and a lifelong acquaintance, described him as "charming and well-liked" but also "most untrustworthy", said he had been dismissed from a position for "financial difficulty" and that during the war he had been jailed after being intercepted at Gothenburg while trying to fly an Air Force B-18 to England; the source doubted the story. The same report records that it was generally agreed in the Swedish Air Force that Christiernsson was "one of the best (and most discussed) pilots in Sweden today", although he had served in it only as a reserve captain. It is document DOW-UAP-D163 of the seventh PURSUE release (October 23, 2026). Blue Book opened a file with that report, the radio monitoring and a report from the air attaché in Rome (IR-44-54) translating a Stockholm dispatch printed in La Provincia of Cremona on December 19; according to that dispatch, the object had not been a weather balloon and a leaflet balloon was unlikely; a Defence Staff spokesman said the crew was entirely reliable and that the ground radar traces could not be checked because of heavy civil traffic. ATIC's evaluation sheet on that report says press articles "are not used as a basis for originating case files". The Blue Book card, on a form dated September 1963 or later ("FTD SEP 63"), reads "Unidentified". Neither the Blue Book file nor the attaché's report mentions the perfume firm's balloons, and the outcome of the Swedish investigation has not been found.

What is solid in the record is two named crew members, an immediate report to a military base and to civil traffic control, and an official communiqué the same day, preserved in the radio monitoring and the press translations, not in the original. What it lacks is an instrument: no document says a radar picked up the object, and all that is recorded about the radars is that General Nordenskiöld had them checked and, third-hand through the Italian press, that their traces could not be checked. Nor are there other witnesses, because cloud hid the sky from the ground.

The cause proposed by the press of the time has the hour, the place and the day in its favor: more than 300 balloons released between an hour and a half and three hours earlier about 20 kilometers to the south, and cards returned from Hässleholm itself. By our own calculation from the ephemeris, at 14:37 and at 2,150 meters the Sun was about 4° above the horizon, to the southwest, and at 15:00 it was still about 2° above it, that is, behind an aircraft heading northeast (about 33°); an object coming head-on would have been fully lit, which fits the "strong metal shine" of the account. And an almost stationary object, seen from an aircraft at 270 km/h, seems to come toward it in the opposite direction at the aircraft's own speed; the southwest or south-southwest course given to it matches the reciprocal of the aircraft's heading, about 213° (our own calculation), which is what that would produce. Without knowing its size, the distance and speed the crew worked out cannot be checked.

Against it is the size. At the 600 meters the crew estimated, a balloon 15 to 30 centimeters across would span from under one to almost two minutes of arc, at the limit of what the eye can resolve (our own calculation); closer in it would look larger, but it would also pass by sooner. The crew described a diameter of about 10 meters and a shape that changed from narrow to nearly round, which Källenius put down to a balloon flattened by loss of gas; Dagens Nyheter itself left the question open pending calculations that are not recorded as having been made. The daylight meteor, the other cause proposed, fits poorly, in our judgment, with an object seen for four to ten seconds just above the clouds; the crew ruled it out from the start.

The attaché's report adds a doubt about the witness that does not appear in the press: a single anonymous source, who had known him all his life, considered him "most untrustworthy", although the same report counts him among the best pilots in Sweden, and the Defence Staff spokesman quoted by the Italian press called the crew entirely reliable. That sketch does not change what they saw or explain the mechanic's account, but it is part of the file. Blue Book, whose file does not record the balloons, filed the case as unidentified on a card dated after 1963.