Canon FTb Instructions Manual page 48

Stopped-Down Functioning/Self-Timer Lever
Lever Lock/Mirror Lock Lever
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Aperture Signal Coupling Lever
Stopped-Down Coupl ing Lever
Lens Speed Adjustment Pin
Back Covcr
lm Rewind Button
D i o p t r l c A d j u s t m e n t
Attachment Groov6
Viewfinder Eyepiece
Battery Compartment
Tripod Socket