Your plow is definitely a 4 - not a 4A . The hitch on yours is unique to 4's . Pics are a 1934 4A with the later non-ripple edge wheel . The plow in the pics is for my A # 410312 as it is the same age . Used to have a complete set of these 4-4A plows but all but this one are gone . Had 5 of them and all were different. MANY differences in the few years these were made . Early ones have the crank bracket also being the spring anchor point . Later ones this is separate etc , etc , etc . This and the last variation are what I call the " Model A " types as the crank and lever can be raised up to work with the high seat on A's . Tylers is the last variation and this one is next to last variation . PS if your threaded rod for the leveling crank is bad I have NOS ones and also the threaded nut it screws into .