JACOB & CO. / A3855
Five Time Zones — diamond-set steel, mother-of-pearl dial47 mmDiamond-set stainless steelHistorical
Jacob & Co. / Reference archive
Five Time Zone
Jacob & Co.’s foundational multi-zone watch family, represented by a documented historical auction reference.
JACOB & CO. / H24
Five Time Zone H24 — stainless steel, silvered dial47.5 mmStainless steelDated example1,800 piecesHistorical
Photographs follow the cited record. Shared source illustrations are labelled. “Current” and “Historical” are shown only where the source supports that classification; other entries are marked “Era not confirmed”. Catalogue coverage & sources