Vtg Conqueror Blue Long Sleeve NY State Correctional Service Shirt w Patch Sz 15

Description

Vintage Conqueror Blue Long Sleeve NY State Correctional Service Shirt w/ Patch sz 15
Please see the pictures for information. I do not know how to measure shirt sizes. I originally started listing this shirt as just a vintage clothing item but when I unpinned it to take pictures I discovered the NY state Correctional Service patch. It was purchased at an auction and appears to be brand new. It was folded and pinned together but was not in a bag so it has a couple very faint dirt marks from being stored with other shirts. I’m pretty confident they will wash out. I do not know what year the shirt was produced. I haven’t found anything in my search results other than people saying this brand is vintage and union made. I tried to refold the shirt exactly as found it. I do NOT know what the little number 2 & 1 next to the 15 means on the inside of the collar. I assume it’s simply a size 15 but please review the photos with my measurements and see the picture for clarification.
I have 2 of these available. They appear to be exactly the same except for a few numbers above the laundering instructions. One has 8766 and one is printed 8764 in the last line of numbers… seems like this is possibly the number of shirts made but I do not know for sure.