Found one here, pretty sure I have another elsewhere… this must be a large hub? I also noticed my crank pin is not slotted for a screwdriver where Charlie’s is.
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That is definitely a large hub flywheel and could be transplanted directly to a model 5 or 25. That engine strikes me as unusual since I can’t remember ever seeing a later brass tag 35 with that flywheel. The ones I’ve seen are earlier with the Jensen decal and what I call the “herringbone” cord.