My '60 LeBaron came with factory belts. They were a standard width belt (2"), but of a courser thicker weave then we find today. My belts were labled made exclusively for Chrysler. There was even a silver sticker on the dash that said: "fasten seat belt" that included the makers' name so I know that it was original. The sticker is a silver oval and pretty tacky. The buckles are the flip-up type, square, chrome. The belts connect to the floor with a hook mechanism to a ring, some have double rectangle buckles that hold the belt at the floor. The 1960 Chrysler master accesssories catalog does show these belts. I have ordered new belts from ssnake-oyl. 1-800-526-4500 or try
www.ssnake-oyl.com. I have not received them yet. My car had only driver and front passenger belts.