Measures about 1 5/8" across x 5/8" high - not counting the pin back.
I did not see it marked/signed anywhere.
This looks in great vintage condition from what I could see - not perfect of course and could use a cleaning, but very nice !
Please have a look around at the other categories in my store to see what I have to offer.
* I do not clean the items - I sell them in the same condition as I find them as I am not an expert.