Quote from Steve on June 15, 2023, 1:08 pm

I have three magnifying glasses of different strengths. I do not own a micrometer but I am thinking of buying one to measure postmark text size. This is a new field for me. I am confused about what's available and, more importantly, what the features are that I should be looking for. I am hoping that those postal historians and philatelists who have experience of measuring postmarks, stamps, covers, etc., with various types of magnifiers will post information about the products they use, as well as offer tips and techniques for getting the best out of them. If you use a measuring device, your help will be greatly appreciated. Thanks in advance.

Yours in ignorance!