I found these two codes on the same map.
Using the following link

http://roadmaps.org/map-information/dating-rand-mcnally-and-gousha-maps/

Can anyone tell me the date of this map? I'm just confused as to which letter to use from the codes. The "L", the "O" or the "M"??

s-l1600 (1).jpgs-l1600.jpg
Last edited by Steven C.; Mon Sep 18 2017 09:13 AM.

Steve Coppens
Always interested in Sunoco items!
Really want a Sunoco National pump ad glass!!