Its hard to see all the picture at once but the back wheel appears to have an extra and larger disk just behind the wheel, when compared with the front one. I assume this is the brake drum, my days of grovelling in the rain trying to fix brakes are long over I'm glad to say.

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I'm no expert on cars that early, 1933 was my earliest, that had front wheel brakes, not that they worked very well being entirely mechanical, my dads little old 1934 morris 8 had hydraulic brakes,
magic they were but it never went fast enough to need them.
mike