Leica I(a) no. 528
with some later factory-upgraded fittings, a Leitz Elmax f/3.5 50mm. lens, the barrel with datum line, lens hood and yellow filter, in maker's leather ever ready case
出版
P-H van Hasbroeck (1983), Leica, p. 41-42.
James L. Lager (1993), Leica. An Illustrated History. Volume I, p. 18-19.