Looking around ebay came across this lot, wondering what model the bottom two pens are? They could possibly be a touchdowns, similiar to some unusual touchdowns seen in this forum recently except these have push caps, at a guess early to mid '60's. South American? Anyway I haven't seen them before.
Ebay image added courtesy of FPB:
The pens arrived safely. I've been bit busy so have been lax at posting follow up images.
These remain anomalous. I'm not sure where they fit in.
Typical 1951 catalogue correct Sheaffer TM (Thin Model) Touchdown. Note the threaded section and the knurled celluloid (?) transparent gripping section
I posted an oddity, a thin Touchdown that closed looks rather like the typical 1951 TM Touchdown, but with the short Triumph (conical) nib seen around 1959 with Lady Skripsert, as well as with smooth matching color gripping section. At least the pen still has typical threads. That this was of Australian manufacture (iirc) left open possibility that this is an Australia-only model, essentially a "late" TM Touchdown, made for who knows what reason
Hugh pointed to further anomaly, the ebay pen that started this thread, seemingly a further mutation on the above theme, with similar short conical nib to the pen just above, with smooth matching color gripping section also like pen just above, but this pair actually with a friction/slip cap, something not documented (i believe) for any Touchdown pen of this shape. I bought the pens on ebay. One has Sheaffer imprint down side of the pen (similar to most TM Touchdown and Snorkel), the other has it circumferentially by the clutch ring. I find it interesting that there are style differences then even between two pens that are "first of their kind" in what passes for my experience.
Both have gold-filled (typically as for "Crest" model) caps, although at first grab they feel a bit more flimsy than what is found on 952-9 Snorkel or classic 1951 TM Touchdown.
Very strange pens. Any info appreciated. These are heretofore unseen models for me.