Stainless steel. Black dial with luminous Arabic numerals. Anti-reflective sapphire crystal. Screw-down case back with high relief engraving of the observatory. Handmade shell-cordovan leather strap with stainless steel pin clasp. Automatic movement (base calibre: ETA A07.161) with stop-seconds function and eccentric fine adjustment designed by Wempe. Water-resistant. Date display. Officially tested chronometer according to German DIN 8319 standard. Case diameter: 45 mm.

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