Ricoh Singlex Manual page 8

Make sure that the film is secure and that the film perforations are engaged with the sprocket teeth.
Locking is automatic. Now, take up the slack of loaded film by rotating the rewind lever clockwise
until tension is felt. Advance the "exposed" portion of film by winding the rapid advance lever and
tripping the shutter until the counter registers " 1".
Your camera is now loaded and " ready".
A single, full stroke of the film advance
lever, advances the film, counts the
pictures taken and sets the shutter for the
next picture. This operation is done as
follows: 1. Put your thumb on the lever
and turn it fully to the right until it stops.
Do not advance the lever part way only.