View-Master Model C Viewer - vintage economy grade - Black bakeliteView Master Vintage Classic Reel Viewer Model C collector grade Just like a "collector grade" Model C viewer, but for the commonly found need to give a little push up to the return knob, back into the upright position. Due to the loss of strength in the 'advance return spring' showing its age, this minor little assist means significant savings for you. The most recognized of all View Master viewers was introduced in 1946 and remained in production for