1937 is the approximate date. Probably earlier since the plates were already on the market in 1926. It is curious that this is a free album where photos could be pasted outside the series, so that each album is unique due to the variety and order of pasting. Series 1 begins November 4, 1926 and is subtitled in French only, and ends July 30, 1935. Series 2 begins July 8, 1928, is bilingual and ends in 1935, and Series 3 begins November 1926 and ends July 1935, also in subtitled in Dutch and French.
This text has been translated automatically from Dutch