Wm Young - Young & Sons Dating Table

Here you will find information about how to date your Wm Young - Young & Sons antique survey instruments.
These are estimated dates that should be accurate to within about 4 years +/-. 

On Young instruments, no serial numbers below 3000, but these instruments can be roughly dated as follows:

All instruments from 1825 through 1840 are signed "W. J. Young"

All instruments from 1841 through 1865 are signed "Wm. J Young"
All compasses and transits made 1832 to 1846 contain additional marking "patent"



Serial number locations on some Wm Young - Young & Sons instruments.


Click on image to enlarge.
 
Possible Location On A Level
Wm Young - Young & Sons Serial Number Location
Possible Location On A Transit
Wm Young - Young & Sons Serial Number Location
Possible Location On A Transit
Wm Young - Young & Sons Serial Number Location