Reference 3800/1 was available from 1981 to 2006 and is a mid-size watch with a diameter of 37.5 mm. The reference features the Patek Philippe in-house caliber 335 SC movement with centre seconds. Reference 3800/1 was available in steel, steel and gold, yellow, pink and white gold and platinum. The present watch is from the second generation of the reference with quick-change date that was available between 1987 and 1992.
Reference 3800/1 and calibre 335 SC are illustrated in M. Hubert & A. Banbery, Patek Philippe Wristwatches, pp. 232-232.