The Browline Ronsir, was the first ever combination frame featuring plastic tops on metal rims with plastic temples.
It was developed in 1947 by Jack Rohrbach, a Shuron vice president, the frame became a run-away best seller that started a design trend that ultimately affected almost half of all frames sold during the 1950's.
This is in the slipper side - see photo 2
|Model||RONSIR ZYL - Made in USA|
|Eyepiece||52mm wide x 45mm deep|
|Temple to Temple (between front joints)||137mm|