I have one of those "mystery manufacture" cocking pieces. I scrounged this back in 1992 from a No4 bolt I found in a gun show parts bin.

I suspect it is a LB/Savage/SM piece that was scrubbed and refinished for Indian/Pakistan service. The bolt was a renumbered Maltby piece that had heavy, block serial numbering, indicative of either POFicon or Ishapore.

Comments/theories welcome