number 300 appears to be stamped on it.   no other markings.

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300 gram engineers hammer?

Hello, For those who have resisted the metric system (like me), what is that in pounds/ounces? Thanks, Lou

0.661387 pounds

my converter says 300 grams equals .6613867866 poundswhich should be about 10/11 ounces a little light for a riveting hammer.
Do you really trust a engineer with a hammer?

Thanks guys!!! I don't even like to see engineers on the jobsite with a pencil!!

That seems like a really strong hammer! I have something similar at my grandparent's house. My grandfather was a mechanic and he had collected many tools during his life. I'm still using them and they are still working just fine. It seems like they are made out of materials that cannot be destructed haha. I've found many similar tools on https://www.kitmondo.com/cat/used-metalworking-machinery/ and I'm planning on buying something from there. There are still some machines that I need and it seems like a great deal getting them second-hand, instead of paying the full price