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This is a manual wind watch powered by the second generation Gruen Curvex movement caliber 330
000 pieces of this movement family (across all models) were produced between 1934 and 1954
On March 1
3 Case Lug to Lug 32
this watch was referred to as "curvex"
Vintage LOUVIC Direct Read Watch Jump Hour "Stan Spiegel" Swiss Made Wristwatch Oris This is a manual windJUMP HOUR WATCH "The early mechanical digital watches are the ancestors of the modern digital watch." As a modern digital watch, a vintage mechanical digital watch also displays the time using digits or numerically with the difference that a mechanical digital watch is powered by a mechanical movement and not electronically powered. The invention of the jump hour dated around 1830's by the French watchmaker Blondeau for the French King. But it was