My best guess is these beaters are for model 1-7A? I have come across 2 different styles of these. The very end as shown in the last photo is made in a cross design. The other design has just a single grove across the end. Hope these are the ones you need.
I love my vintage Mixmaster and use it frequently! Combined weight is 9.4 oz so shipping weight for the cookbook and the beaters will be for a 1 lb package.
Photos are of the actual item that you will receive. Clean and from smoke free home.
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