PING for info/verification by a Professional?
Stay Safe in the Panhandle Sir.
Yeah I have to say same as above.....his first initial of his last name and last 4 of his SSAN was normal laundry mark an ID. Cant say or provide much more without a photo or time date era. The last 4 laundry mark would have been post serial number when only ones SSAN was used as a service number.
Stay Safe !!