Where would they have got: .... French CDL out in Palestine though? If it was yellow then you have to think painting it was an opportunistic/impromptu thing, rather than a a deliberative attempt that involved putting an order in for yellow from Britain and then waiting three months for it.
Was there a French unit in Macedonia? There was one in Gallipoli I think in 1915. Wasnt there also a French Seaplane carrier in the region in 1915/1916. Maybe they found stocks left over from those? But that is a couple of years from 1915 to mid-1918.
An engaging mystery.
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