Leitz OZTNO
LTM to M accessory adaptor
The Leica OZTNO adaptor allows the use of attachments designed for thread mount Leicas to be used with M cameras. Such as the example below, shown an early delayed action timer (self timer) model APDOO attached to a Leica M2 via an OZTNO adaptor.
Note: LTM accessories do not seem to function on the modern MP with the OZTNO, perhaps the MP's shutter released is to far recessed.