This is one of two molds that uses the Samsonite Open O logo and has a mold number on the short side only. Both types are easy to separate (by mold pip location, pat pend mark and mold number font).
Logo: Open O logo within ring. Many of the stud logo’s look very poor. Some are off-center.
Material: CA, ABS
Wall type: Thick
Inner ribs: none
Inner tubes: with rounded bottom
Flowrib / center line inside top surface: No
Mold pip: short side just above the center
Mold position numbers: 1 to 24
Intellectual property protection: Faint Pat pend
- CA: red
- ABS: red, white, blue
[Original post and comments on Flickr.]