My Push Key Padlock collection

This is my pin tumbler push key lock collection. There are Yales, Sargents, Corbin, Fraim Slaymaker, Simmons, and one I've yet to identify the manufacturer of. They're all 4 pins, except for the two Sargents which are 5 pin. Two of the Yales have round shackles, rather than the flat shackles of the other padlocks. If anyone can let me know the manufacturer of the unidentified padlock (the one between the Simmons and the Fraim Slaymaker), that would be great.