[Ron Wood]

I am a little bit at a loss to determine how the grip markings were made. They do look more like engraving than pantograph, but the termination of the lines is very odd. If I were to venture a WAG, I would say that it was pantographed with a ball cutter rather than the usual straight sided or V cutter. The irregularity of the lines might indicate that the template for the pantograph was hand made. Could be modern or it could be a field or shipboard expedient.