I have a stamp that on first blush appears to be a T&T Type 233. However the space between the lines on my stamp is 12 mm, which would make it a Type 232 (not listed for Rochester in the T&T catalog) rather than a Type 233 (11.5 mm line spacing).
In addition, the lines on my stamp appear to be 1 mm thick rather than 1.1 mm thick. But as I am using the mm scale on an Honor-Bilt perf gauge, I question my capability to measure to the 0.1 mm with it.
Any help in figuring out what I have is appreciated.