Tolner Padlocks / Wm. Wilcox 1864

[cjlindem]

I recently found, on google, a pdf copy the 1864 catalog - Bliven, Mead & Co Illustrated Price List of Hardware.
It has a padlocks section which lists "Wm. Wilcox Wrought Iron Plate Padlocks". The picture above shows an unusual looking lock which doesn't match anything I've seen before. Both because of its unusual shape and also that the keys resemble the flat push keys used later in the 1871+ (Miller) pancake padlocks. The key also appears to be shown as being inserted on the left side of the lock in an upward direction?

I know Wilcox made many styles of smoke house padlocks from as early as 1845, but I've not encountered one of this shape, nor with the pancake-style flat push key. One other curiosity is the description "Tolner Padlocks" which seems to suggest a style, but I find zero other hits for this on google except for in this catalog.

Does anybody have thoughts to this mystery? Thanks!