A. Lange and Sohne Grosse Langematik Gangreserve Limited for Wempe 18k Yello Gold. Model Reference 304.048
This is an 18k yellow gold A. Lange & Sohne 304.048 Grosse Langematik Gangreserve “Limited for Wempe”. It has an alligator leather strap with an 18k gold tang buckle, and scratch resistant sapphire crystals. It includes a pull out signed winding crown, and an exhibition sapphire display case back secured with 6 screws, and engraved with “A. LANGE & SOHNE – WEMPE –GLASHUTTE SA.,” hallmarks and serial numbers. The 40.5mm diameter solid two-body case, curved lugs, and convex bezel, are polished/brushed. The dial is silver with black Roman numeral hour markers around a black railway-style perimeter minute scale. It has blued feuille hands, and there are two recessed subsidiary dials with black Arabic numerals, markers, and blued indicator hands, including a 48-hour power reserve register at 12 o’clock, and there is a running small constant seconds dial at 6 o’clock. It has a 48-hour power reserve at full winding, it’s water resistant to 30meters/100 feet, and the 10mm thick case, dial, and movement are all signed.
This A. Lange & Sohne 304.048 Grosse Langematik Gangreserve “Limited for Wempe” has a mechanical automatic self-winding A. Lange & Sohne caliber 921.6 SAX-O-MAT movement. It’s made from Glashütte 3/4 plate in German silver, with Cotes de Geneve and fausses cotes embellishment. It has an embossed bi-directional winding three quarter rotor in 21ct gold and platinum, with 4 ball bearings in the gear change. It has a shock absorber mechanism, and it’s constructed with 46 jewels, blued screws, a straight-line lever escapement, and a monometallic Glucydor screwed balance that’s adjusted for temperature and 5 positions. It includes a beat adjustment with a micrometer screw, and a self-compensating flat balance spring. It has a Nivarox hairspring with a swan-neck precision regulator, and a hacking seconds device with automatic zeroing of the seconds hand (zero reset) when pulling the crown. The mechanism oscillates at a frequency of 21,600 VPH (3 HZ).
The A. Lange & Sohne 304.048 Grosse Langematik Gangreserve “Limited for Wempe” was produced in a limited edition to 100 examples to celebrate the German jeweler Wempe’s 100th anniversary in 2006.
The watch comes in original packaging, with a set of documents.