Blancpain 2100 Leman Aqua Lung Ultra Slim 18K Rose Gold Black Dial LIMITED

The Blancpain Leman Aqua Lung Ultra Slim ref. 2100-3630A-64B is a restrained, highly collectible take on the sport-elegant Leman line. Produced around 2002 in a limited run of 200 pieces, it pairs an 18K rose gold case with the understated Aqua Lung design, an unusual combination that gives the watch real character without sacrificing its clean, slim profile. At 38 mm, it wears with the balanced proportions collectors still look for in early 2000s Blancpain. The size sits comfortably between a dress watch and an everyday sports watch. A black dial keeps the look crisp and legible, with a subtle military influence, while the case retains the polished finish and refinement expected from Blancpain. Inside is the Blancpain caliber 1151, an automatic movement known for its slim construction, twin barrels, and 100-hour power reserve. It is a major part of this reference's appeal. The movement suits the watch well, both technically and aesthetically, and gives the Ultra Slim more substance than the name alone suggests. The Aqua Lung designation also matters here. It ties the watch to Blancpain's modern diving lineage, but in a quieter, more elegant format than the brand's larger tool-watch references. Combined with the limited production, rose gold case, and caliber 1151, that gives this piece a distinct place within the broader Leman range. For collectors of modern Blancpain, the 2100-3630A-64B is an uncommon reference with a lot going for it: attractive proportions, a strong movement, and relative scarcity in the market. Like New with Blancpain box and undated papers.