Bill,

A close examination of those photos reveals a difference in the shape of the
wood-to-metal interface at the bottom of the tote.

You may have a different "type," although I sense that these Cowell & Chapman
plows are too rare for anyone to make a formal type study.

Yours might be a prototype, or a patent model, which would explain the lack of
markings and the less-refined appearance of some parts.

Most likely, your assessment as a "repaired" tool with ersatz parts is correct.

Whatever you have, FWIW, its body is not exactly the same as the Cowell &
Chapman shown in the David Stanley Auction.

It's a very interesting piece. Making nicer parts will probably improve its
value in addition to its usefulness. Go for it!

John Ruth