Sorefa track chains ....JCB 8052

[JimInOz]

I've been trying to identify a nice pair of Sorefa track chains that I have here.They are Sorefa brand,with each link showing # 2045.
I was told they may fit a JCB 8052 excavator,but I'm unsure.
PITCH: 135 BUSH: 35 LINKS: 38
Can anyone identify these chains,which have 400MM plates on them.?
I wonder if they may fit a PC50 or similar unit.
As usual,getting track info is hard.

Thanks,
Jim