I think it's a serial no? Which would mean many more might have been made vs. a single movie. And they were probably all found together in one big lot...
not a serial Chris, just a regular poster. There are 3 or 4 styles and I have had them all.
The poster on linen, done badly, has been on ebay for at least 12-18 months, however a different dealer had apparently found a small stack of that title, across the different styles along with 3sh & lobby cards in lower qty.
I bought some, auctioned them already. He also found a number of other 30s posters, including a great Horse racing 3sh I won and a great 6sh on the same title that I lost.