here is what i found out from Alan Task..
1. NO lettering on the battery AT ALL ever.
2. Red tops on standard battery
3. Yellow Tops for the heavy Duty which Antique battery sells
you MUST measure the size of your tray to get the right battery, there were 2 sizes of trays i have learned,. i dont have the exact measurments but i was able to get the correct one from them with the correct itops.
Hope this helps all@