Vintage Enders Blades store Made by Christy in Original Box 50+ Blades 1920s 1930s

store Vintage Enders Blades Made by Christy in Original Box 50+ Blades 1920s 1930s
Boxes have age and storage wear, 1 of the "pack of 5" has been opened and partially used.  There are 10 "packs of 5" little boxes that haven't been opened or used, so there are 50 unused blades and the partially used pack.  
I do not know which razor these will fit into, please see pictures.