Something rubbed / pressed on the stock in the crate. The sling or fabric on the wooden crate rests the rifle sits on.

 

Makes sense, especially when the stocks are soft wood and I guess they could have gotten very hot during shipping.

 

looks like it's more in the finish than in the wood.

 

I've got a PS [0141] as well. It's virtually new but Buuba made it better. When I noticed it in the rack at my LGS, it was in an ATI Monty withe a receiver cover mount, 2 bits gone forever. I did the best I could with what I had on the shelf. Timbersmith wood, Romy sling, Tech Site 200 on a scrubbed cover. Looks OK to the untrained eye but still kinda haunts me, PAX

 

That guy must have been high on up the ranks in the Public Security agency to own such a fine rifle.😀 I see no bayonet. Mine came with one but had the regular screw in the hole. The mount is a rivet style. It had me fooled. It looks pretty normal and good until you find out the screw just keeps turning like it is stripped. I had to rob a trap door, cleaning kit, and screws, butt plate was underneath, off of another stock cause this was on it---------------

 

I have a rifle with that CAPCO dealer optioned slip on/screw on recoil pad and black Naval sling, a Navy Arms Cowboys Companion. I swapped out the Redstar 2.5 scope for a Leapers fixed 4X28. The T89 mount has a left off set, I added an offset Blackhawk cheek riser too, so it snaps right up there.
Then there's a KSI Hunter with the shorter CAPCO screw on pad (very rare in wood without the "Westcoast Rail"). That one has an optioned NSTAR brake too, I put on a Romy sling, they just look too boss, PAX

 

A factory 26 Public Security Type 56 carbine.










A Factory 416 Public Security carbine.

 

I think the /26\ rifles were the only blade PS guns and are scarce. Martin08 has one too I think, PAX

 

Looks like it included a bayonet, but not attached.

 

I thought that pic looked familiar. It's mine ! here is my original.

 

Maybe it is yours. My file shows my old cell phone camera took it
Do you have a link where I would have copied it from?
Here is my link and I posted it here Nov 15, 2017--------------

https://www.gunboards.com/threads/rare-early-public-security-chinese-sks-factory-26.873305/page-2?post_id=7916657#post-7916657