Type 99 without Serial number

[fjruple]

Warpig1976--

I have seen two methods for the recovery of serial numbers or markings. The first is a chemical process, the area where the serial was is polished to a mirror finish. An chemical acid is applied which brings up the serial number and quite readable. The second process is little more involved. The defaced area is milled flat and a very thin sliver of the area is milled off (about the thickness of thin paper) The thin sliver of metal is then cover in a blue ink. The metal is then examined under a microscope. The sliver can also be view in different type of light for better refection. The sliver can also be x-ray and then examined under a microscope. I have seen pretty deep serial numbers recovered. The last process is the most time consuming and expensive.

Cheers

--fjruple