Having just acquired an open express body for my 1917 Maxwell I'd now like to be able to temporarily attach an extra seat as in this picture. I would like to do it in a period correct fashion and seem to remember seeing somewhere online reproduction latches to do this. Does anyone have any suggestions or ideas how this was done in the old days?
I bought some Window Sash Spring Bolts for my depot hack but never installed them. Here's a photo from the houseofantiquehardware.com that shows what I am talking about.
The depot hack is in my profile photo.