Wittnauer watche dating

Although our valuations are based on research and experience, opinions can, and sometimes do, vary among experts.

Appraiser affiliations: Finally, the affiliation of the appraiser may have changed since the appraisal was recorded.

An appraisal usually involves an extensive amount of research to establish authenticity, provenance, composition, method of construction, and other important attributes of a particular object.

wittnauer watche dating-68

This is getting more common as hobbyists are repairing and restoring vintage Gruens now.

This has been great for the community as more running Gruens are entering the market daily.

There are more prefixes and ranges yet to be completed for these and other case manufactures. This table has 3 manufacturers listed - Gruen, Keystone, and Star.

And there are more movement serial numbers to be decoded as well. They way it is read is you read the first 2 or 3 characters from the CASE SERIAL NUMBER and locate them in the corresponding columns.

For a very long time, we've been in the dark when trying to locate the date the movement was manufactured. " tutorial so that you can put this new information into context.

It's another bit of data to be added to your watch's "date set", in this situation the Movement Manufacture Date.- it is common for watchmakers to swap out the entire movement as a method of repair.From a statistics standpoint, this practice is disastrous.It takes away one ability to find the date of a vintage Gruen.While not completed, there has been significant progress this year for Gruen, Keystone, and Star manufactured cases.Prior to this table there was only Wadsworth serial numbers that had been decoded.So, before you swap out your movement, think about repairing, please! One caliber 440 movement date is not enough to accurately date a Gruen Curvex watch. if you are absolutely sure the movement is original (aka this is a new old stock Gruen), then OK, take the risk.

Tags: , ,