»Prestoneta« by Birnbaum, c. 1934
Emil Birnbaum, Rumburk & Prague. Size 4 x 6,5 cm, with barn doors front: pushing the knob, 2 horizontally attached doors jump open and the folding viewfinder pops out! With Birnbaum Doxanar Anastigmat 4,5/7,5 cm in Vario.  Very rare! 
Estimate: € 300/500
US$ 450/700
Reserve: € 150/US$ 250
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