According to Richard Paine in his book "Review of Graflex", the Revolving Back Graflex Junior had three choices of lens (in 1915):
B&L Kodak Anastigmat f6.3, #3
B&L Tessar Series Ic f4.5, #15
Cooke Series II f4.5, #2
In the text on the RB Junior, Paine says "Though normally equipped with very long lenses in relation to its film size, samples have been found fitted with the B&L Tessar Ic #14, which provided a greater focusing range." Looking at the 1920 B&L catalog on Camera Eccentric http://www.cameraeccentric.com/html/...schlomb_3.html page 57, the Tessar Ic #15 is a 6 1/2" focal length and the #14 is a 5 1/2" focal length.
Len
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