Welcome to the slightly complicated world of the 1917 Commerce issue, Roger!
The sheet number suggests that your dealer has a Small Logan-Typed General Manager (italics) $10.
That would be 75-16-12.
To differentiate the signatures, the Small Logan is 2.5 cm from end to end, with a very small loop in the lower part of the letter g of Logan. The Decorative Logan is 3.2 cm from end to end, with an extravagantly large loop, almost triangular, in the g. (All Decorative Logan notes are rare.) FYI - The different styles of Logan are clearly illustrated on page 64 of Canadian Bank Notes, sixth edition.
It is a rare note, with 10 on the register. If confirmed, the note under discussion would be the eleventh to turn up.
If it makes VF the catalogue value would be Cdn $1,050 ($550 for Fine). The top grade recorded so far is also VF (pressed).
It would be great if you could obtain an image to post to this thread, so the identity of the note could be confirmed for note register purposes!