 
| Durowe 451 (INT)
Features manual wind sweep second
Data 10.5''', Dm= 23.35mm H= 4.0mm 17 jewels f = 21600 A/h power reserve 40h
| Remarks 1968-1970
family: sweep second 10.5''': 451 : - 451-1: 12h- and 24h display 451-2: date 451-3: day, date sub second 11.5''': 470 : - 470-1: 12h- and 24h display 470-2: date 470-3: day, date sweep second 11.5''': 471 : - 471-1: 12h- and 24h display 471-2: date 471-3: day, date 471-4: minute stop feature
Example, year: signature; shock device ca. 1965: 17 Jewels; Duro-Swing (Durowe 450, 18000A/h)
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