Thanks Brian. I'm wondering, though -- and it's reasonable -- whether this is an EAL body before being ground down? What about the stock stamp where it has 130 over broad arrow over what looks like MK 1?

-- No proof marks or .303 stamp
-- No4 Mk1 but no normal serial number
-- Serial of -02
-- Inside butt socket unknown mark, circular, looks like machining but could be writing.
-- Stock stamp of 130>MK1?
-- All Longbranch parts
-- Every single part is consistent with EAL, except for the stamp and unmilled receiver, but the myth behind the legend is that EAL used surplus Longbranch receivers.

I recognize that there are no tolerance differences consistent with letters being ground out of the action at EAL. But would it make financial sense to manufacture new No4 receivers for a few thousand rifles, in a world where rifles built on surplus receivers were almost literally a dime a dozen?