Toni has hit tnhe nail on the head - these freewheels were designed for use with the T series of 2-speed fixed hubs and were not made post WWII.
Hilary Stone, Bristol, England
> From: Toni Theilmeier <toni.theilmeier@t-online.de>
> Date: Sun, 11 Jun 2006 19:51:34 +0200
> To: Mark Bulgier <Mark@bulgier.net>
> Cc: classicrendezvous@bikelist.org
> Subject: [CR]ASC to freewheel converter
>
> Dear Mark,
> the wildest part of the issue is that the ratio of an ASC is more or
> less the one of an AM - so the sense of the freewheel converter on an
> ASC escapes me completely, excepting use on bikes with very low b/b
> heights. Perhaps.
>
> What I really think is that the converter is for use on a TF / T hub -
>
> this was the pre-WWII stepped shell two speed that had an external
> freewheel. In my box I´ve got exactly the item shown in the auction
> you
> mention, and it was on a T which I "converted" to a TF by substituting
>
> the freewheel by a simple sprocket. I do hope I remember this
> correctly.
>
> Regards, Toni Theilmeier.