Introduced in the mid 1930s the Rolex reference 2508 is a favorite amongst collectors due to its oversized case, flat bezel, and classic no frills design that is, compared to the rest of the brand’s production, more in-line with those of two other historical Genevan brands: Patek Philippe and Vacheron Constantin.

This reference existed in two different configurations. Early models - MKI - feature olive-shaped pushers and a larger case diameter (37.2mm); MKII versions instead come with rectangular pushers and a 35.2mm case. Furthermore, early 2508s have the serial number punched on the caseback, whereas later ones have the 6-digit number finely engraved at the edge of the back.

The present watch however represents a very rare MK1.5 example. A transitional design, it features numbers to the back and olive pushers as a MKI model, but it also presents the more compact size of the MKII case. Such transitional pieces are extremely elusive and offer an intriguing window into the evolution of the model. They appear to have been produced in extremely limited numbers with serial numbers in the late 30’000s - this present one bearing no. 037’677 - thus around 1937/38. Research on publicly sold pieces allows to establish that MKI pieces were in production at least until serial 034’609, while MKII examples appear from at least as early as 041’336. The other MKI.5 2508 - also retailed by Bucherer - sold by Phillips is example no. 037’609, and other MK1.5 pieces publicly sold are nos. 037’651, 037’691, 038’372, 038’350.

The present watch will thrill the most jaded collector with its combination of retailer signature, transitional features and overall boundless intellectual and aesthetic charm.