Originally Posted by Kitzone
I inherited a Singer 15-91 the other day and I am a little baffled. Attached to the pressure relieving thumb screw is a "Revco" release button. Has anyone else seen one of these and do they know the purpose?
I don't know if anyone answered this, but I have not seen a 15 with the Revco button. Very interesting, what does it do - release the pressure on the foot?
Nancy