Canadian Boardmaster Shingle Jig Pics?

[Bucksaw]

I'm looking for some detailed pics of an old Board Bandit/Canadian Boardmaster Bandsawmill shingle jig attachment.
The one I'm thinking of was used with a single block of wood and fed it into the stationary saw head and cut from the bottom.the sawn shingle dropped out the bottom under the mill and the jig slid back and repositioned the block for the next tapered cut.