Quote from blackdog1 hour ago, blackdog said: It has already been pointed out but doesn’t look much in tone with 20s advertising. I guess you can get away with the cartoon illustration, but the palette seems way off, don’t recall ever seeing that aqua colour in that sort of stuff, was always quite warm palettes even whites as off-whites like ivory/magnolia. Not an expert but that’s what I remember.
The other big part of selling such an idea would be font choice, which are quite off atm.
in fact you could deffo sell this poster idea without illustrations and just the right combo of colour and font.
Also the brand should be the most noticeable wording on there, but is yellow, almost invisible compared to the rest.
Finally I think the aspect ratio is not ideal, I would think stuff from that era would be mostly 2:3, any standard paper size. In Day of Defeat there weren’t weird sized poster for eg.
And after you've followed the above advice, you need to apply some overlays and filters to make it look like a physical poster instead of a flat graphic. As a minimum, it needs some sort of paper grain, but to really sell it you should add wrinkles and folds, and maybe a few different versions with torn or folded corners revealing old posters beneath.