Mr Tiefenbrun has seen the light - again - apparently

[pure sound]

The Mamiya story may or may not be true but personally I'd doubt it as I once definitely saw the Ittok (without screen printing) in the catalogue of what I'm sure was a Japanese oem supplier along with various other arms. Not Jelco but someone like that.

EDIT

Actually a subsequent websearch reveals this which sounds about right.

"Originally manufactured for Linn by the Denon Parts Company of Japan (no
relation to the electronics brand), it was designed by a certain Mr Ito to
Linn's specification back in the late seventies. The Tik-Tok (as fans called
it) evolved over the years with various detail changes (such as a new
counterweight), until it reached its LVIII incarnation in 1989. This last
version of the Ittok was undoubtedly the best, featuring Ekos-style glued
armtube joints. By this time, the price had risen from the original £230 to
over £450." ...David Price

I think the Mamiya story was perhaps wishful thinking!