Years ago (like about 1994) I had a job lot of BSA bits which included what I assumed was a Devimead end feed converted inner timing cover.
I didn't have an A65 back then, so the bits slowly got sold/swapped for Triumph parts.
I could have sworn that the quill oil seal was retained by an internal circlip.
Now today I have just received my latest eBay
bargain (maybe), a '71 type cover with the Devimead welded on block.
Not as neatly welded as the original one I owned, and definitely no circlip retaining the oil seal (or any groove)
Was I imagining that circlip in the first place ?
I could swear it was there.
I might add that the original engine was used in a racing outfit (and eventually threw the DS rod at speed)