Hi Deany
I looked in some of my old gardening books and while none of them are from the 1930s, I thought I might mention the varieties listed anyway. A bit of tomato growing history if nothing else.
The Amateur Gardener by Mrs Loudon, 1880 mentions
The Conqueror and
Hathaway's ExcelsiorThe Lazy Gardener by F. C. Connelly, 1945 mentions
Market King and
OutdoorDig on for Victory by C. H. Middleton, 1945 mentions
Ailsa Craig,
Market King,
Stonor's M.P and
Best of All I also have an Australian book
Notes on Gardening and Elementary Agriculture by John Halstead, 1910 that mentions
Duke of York and
GiantInterestingly it mentions that
Giant was a light yellow tomato and well flavoured.