Gangbanger's DB?

[Phosphorus32]

Picked up this DB (Lushun) in a beat up stock from Sierra Auction in Phoenix, AZ.  They move a lot of police (narco) seizure vehicles and other merchandise, so I'm speculating that this was not a consignment from a collector's estate    I wanted a DB, and this'll be a good placeholder until a nicer one comes along.





Apparently the only parts that belong to the DB are the barreled receiver and direct attachments. The other parts all match another SKS, and I would guess they are not from a DB since three of the numbers in the SN of the receiver are present in the SN of the donor parts, and they all exhibit font variations from the receiver SN.





I don't have many late SKSs so I don't recall if it's common to have numbers on the barrel and receiver, in this case, 4-4-72-8 and 9-2-71-11 respectively. 






Assembly or Part Numbers    I don't recall seeing this pattern of numbers on SKS before, but it's probably just me.  It has 06-721 on the firing pin; 06-722 on the bolt, bolt carrier, and gas piston; 06-723 on the op rod; and just 06 on the face of the extractor.









Serial Numbers









RIGHT








LEFT

[Phosphorus32]

I know this one's a bit frustrating because you can't match the parts to an arsenal, if my assumption that they aren't from another DB is correct.  It was dirty, sooty and carbon fouled when I got it but the bluing beneath the gunk was excellent.

[running-man]

Could be Jon.  I've not seen the XX-721/2/3 markings on other parts besides receivers and bolts.  That the firing pin has one is really interesting!  Looks to be either a part number like on the Yugos or perhaps a month/year designator.  The 721/2/3 might even be some kind of arsenal indicator if this Shenyang gun is indicative of the DB/DP production runs:


In fact, now that I think about it, there are a large number of DB/DPs that have 711/721/722/723 prefixes.  Many don't have them in large font like the above example though.  I wonder if they must have some connection with the large 7(x) codes on many [] arsenal receivers too?  I've leaned towards 1970 and 1971 dates on those ones, but they could certainly be something else entirely.  Very interesting! 

[Phosphorus32]

Great, thanks.  So the presence of these 721/2/3 numbers are characteristic of DB or DP production?  The leading 72 may be the year?

I wonder if the 71 and 72 in the 4 part receiver and barrel numbers are also indicative of year.  my first guess would be day-month-year-indexing number of that part produced that day...but I'm just waving my hands now    With the low output of these factories I wouldn't be completely shocked to see different years of manufacture for even the receivers and barrels.

Oh, and it does have a cleaning rod. I have a bad habit of leaving those on the bench after cleaning and reassembly 

[running-man]

The 4 part barrel and receiver numbers are likely some type of iteration of the 3 digit numbers we found previously: http://sks-files.com/index.php?topic=1314.msg16142#msg16142

I was thinking the three digit ones were in the ammo crate style of XXX-YY-ZZZ being lot number-year-factory.  Two digit or four digit kind of tosses that on its head, though maybe the first digit is a month code or some other unique "born on" identifier.

[Loose}{Cannon]

These are one of the VERY few that dont seem to follow any normal dating method we have seen.  I would love to nail these down, and these numbers Im convinced is the key.   

[Phosphorus32]

The 4 part barrel and receiver numbers are likely some type of iteration of the 3 digit numbers we found previously: http://sks-files.com/index.php?topic=1314.msg16142#msg16142

I was thinking the three digit ones were in the ammo crate style of XXX-YY-ZZZ being lot number-year-factory.  Two digit or four digit kind of tosses that on its head, though maybe the first digit is a month code or some other unique "born on" identifier.

Yeah, a bit puzzling. There are a number of potential schemes for the numbers.

These are one of the VERY few that dont seem to follow any normal dating method we have seen.  I would love to nail these down, and these numbers Im convinced is the key.

It'd be great to see a lot of examples. There aren't a ton of these out there and few people post every last detail like I do