I am rebuilding mine from a '30 coupe.
It was a dark blue under some green when I hot pressure washed the oil off.
It also does not have any ID number stamped on the flat rectangle on the generator side.
Is that where the number should be?
My shop man says it has also been rebuilt previously.
Any thoughts?
Sounding like one of the "surplus" engines left over after Model A production ceased.
The green is likely Ford Green and with which most factory engines are a single coat.
The underlying blue might be from tail end Ford production of the 30s - and Henry's "wear it out make it do" personal philosophy.
Any other markings on the engine might give you more clue. Like a "diamond" block (showing a diamond shape on the engine block "transition curve" above the timing gear cover) or the shape of the actual number pad itself which went through several iterations and has been mostly documented (can be found online with Steve Pluckers excellent research.)
The fact that is unstamped for number is a clue too, but only someone familiar with the engines could tell if the number has been ground off or removed during a re-work.
I correct myself. Engine in my truck is a 1930 roadster engine. My red sears replacement engine is as yet unrebuilt and is unstamped and unmodified in the stamp area. These blocks are somewhat prized by restorers looking to have the ultimate "matching numbers" designation. This even though the chassis number is normally unreadable except by removing the body - a difficult at best task.
An unstamped virgin appearing block, a set of reproduction number stamps, and a readable chassis number is all you need to get to that "original" condition (and may be willing to pay extra for.)
I may yet restore that Sears engine and keep it red simply as a way to prove "history." And to attract attention and comments.
If all the Model A engines are brought to Ford green and numbered matching the frames - then who will be the keeper of knowledge of what once was but is no more?
"Hey, that engine is supposed to be Ford Green."
"Not this engine..." (opening for discussion.)
Joe K