What chain is this ??

[Cut4fun]

I have a chain that came on my P 5000. I know it is .325 and looks like the word poulan on the chain tie straps and has P31 on the drive links. Not a safety chain either. It came from the north west in B.C. and looks to be a .325 square chisel chain. Can anyone confirm what the P31 is on the drive links?

 

[SawTroll]

My guess is that it is a Poulan badged Oregon chain, and maybe a low-profile (30-series) chain, but that is about as close as I get.

Square ground???