A. Lange & Söhne Lange 1 Timezone Sincere Singapore 116.025B

It shares the 41.9 mm platinum case, 11 mm thick, and the silver dial of the regular platinum Time Zone, the 116.025, and takes the same 22 mm strap; the B suffix and the limited run are what set it apart. The same case was made in yellow gold (116.021), pink gold (116.032) and white gold (116.039). The later 136-series Time Zone is a touch slimmer at 10.9 mm, and the white gold 136.029 pairs it with a black dial.

Sotheby's catalogued the pink gold 116.032 with the manually wound calibre L031.1. It shows two time zones, each with its own day/night indicator, and the second zone is set separately with a pusher at 7 o'clock.