You need to get a stamp grill measurement tool. I recommend this one. Then once you measure it, if it is one of the more rare grill sizes, you will need to get a certificate of authenticity from a stamp expertization service, as grills are often faked.

I agree with Ryan, the Multi-Guage is a crucial tool for those who collect USA – used for Grill IDs can relieve a headache or two.

@jblaha thanks for your feedback and joining the community! 😊

Thanks guys

Hi” I don’t see any sign for grill on my stamp! I use a good microscoop but no luck.

@abdulallah, The photos upon your original post do not appear to show grill marks.

@jblaha 

Hi” I hope these pictures are useful, and if they are not, I hope you can enlighten me on what to do.

Thanks