Sirene Plate cameras 1926-1927
From the Ica company Zeiss Ikon inherited the Sirene camera for the 6,5x9cm/9x12cm plate formats.
The picture above is from the catalog C 292 b, dated October 1928.
Even during its short production/selling time as a Zeiss Ikon camera the Sirene changed from Bestellnummer...
The next table lists the original Bestellnummer starting in 1926 next to the newer one, late 1928/early 1929.