An old Stanley Eureka Flush Sliding T Bevel, made in USA.
This I believe was the smallest version made and from what we have observed it is a much scarcer version.
Marked 'Pat'd 7-14-08'
Blade Length: 5 3/4 approx.
For general info about this tool, see the Stanley Sliding Bevel No. 18 review on FindMyTool.co.uk
Condition: please see photos for condition.