Excellent, Charlie.

I'd just like to correct one last line in my research above:  "The latter
shows it as an "& Son" plane without the body being marked "Perth Plane
Works" (as I would expect it would be were it made there), so between
1878-1903."  This should finish "..., so between 1891-1903, with a rare
possiblity that it could have been made in 1878."

Glad you remade it as a user.  I'll have to go take a look at my toothing
plane and see who made it.  IIRC it's also bedded at 90deg.

Best,
Bill
Felton, CA