They exist in a couple formats. First is the price guides designed to be added to the Salesman Data Book, these have a date issued as shown.
https://www.flickr.com/photos/advance-design_parts_co/8131120023/in/set-72157631872034068
Another is in the left side of the Salesman order books (also dated).
https://www.flickr.com/photos/advance-design_parts_co/8296840257/in/set-72157631872034068
There is also a small price guide offered for most years by the vendors with information similar to this.
https://www.flickr.com/photos/advance-design_parts_co/8131148078/in/set-72157631872034068
Most of my original guides have hand written or typed price changes in them as they were updated by the zone offices.
https://www.flickr.com/photos/advance-design_parts_co/8131119797/in/set-72157631872034068