I have had these two Halibrand wheels, with The Old RaceMaster slicks in my garage for over 30 years, and they are as follows. 1. They look like the " Kidney Bean " Style, the difference is there are only 4 slotted holes instead of 5... ( Approximately 1 in. height by 2 in long. ) 2. They are 15 x 8, or x 10, I am not sure which, but they do have at least 30 year old RaceMaster Slicks.. 15 x 10.50. mounted on them, and They are the old Hard rubber type slicks. 3. They have the old Big Ford 5 bolt pattern only. 4. They are Halibrand Wheels. So does anyone know if they are from the 1950's, or the 1960's.. Do they have a date, or a code stamped some where on them ?