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, offered in excellent almost unused condition 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.