ID this chain please

[2broke2ride]

Can anyone ID this chain? It is .404 pitch on an old McCulloch. It is Oregon chain with a number 25 on the rakers and a number 51 on the drive links.
I have never seen square ground chain and want to make sure that's not what this is before I put a round file to it and ruin it

 

[2broke2ride]

Nobody?

 

[Marshy]

Cant tell you what chain it is but it doesn't look square filed to me.

 

[disturbednny]

Its Oregon 51 chain. looks like the 51L variant, but you should probably wait for someone more experienced than me to chime in.

 

[nstueve]

Correct... 51L is chisel chain with the reduced kick back ramps.

Oregon 51L - 404 pitch .058 guage
60* - 25* file (10*yaw) / grind angles
0.025 raker/depth
7/32 round file or 3/16 grinding wheel

 

[2broke2ride]

Thank you gentlemen that's what I needed to know.

 

[svk]

Sorry didn't see this last night or this morning. Looks like you got things figured out.