I recently acquired from the "rummage sale" of Washington School of Photography a lovely 12" f/6.3 barrel lens marked (on the front):
DOUBLE ANASTIGMAT F:6.3 No. 5a 1794 EASTERN OPTICAL Co.
It is marked on the barrel:
EASTERN OPTICAL Co. BROOKLYN-N.Y.
On the barrel at the very front is marked:
E. F. 12"
The barrel also has a foil label marked:
Burke & James Inc.. Chicago 4, Ill.
On the rear is the marking:
Does anyone have any information about this lens?