IWC with case from 1955 and movement from 65, Franken?

Samiwatches · Apr 24, 2019

Hello guys! I purchased a Vintage IWC with very little information in the add.
What I have found out myself after receving the watch, is that it is a Ref. 500 according to iwc forum
and Runs on a cal 401.
my concern is the big age difference.
Can anyone help me? is it a franken or something?
Movement #: 1,782,161 made in 1965
Case #: 1,335,904 delivered in 1955

Dan S · Apr 27, 2019

The case and movement numbers should not be so far apart. It's not unusual for them to be separated by a year or two, and I have heard some IWC collectors say that the gap can be as much as 4 years for certain models, especially in the 1960s. However, 10 years apart is too much.

So assuming that you have the numbers correct, the watch is not all original.

IWC with case from 1955 and movement from 65, Franken?

Samiwatches

Dan S

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