There are two different seats for a W113 Mercedes. The early seat has a narrower more square bottom cushion than the later one. They may be the same frame with different padding I am not sure. I am also not sure when the switch was made I just thought i would bring it up. If you are going to spend the money on seats you might as well find the right ones. you can plan on spending about $2,000 USD on recovering a pair with new pads so needless to say nicer seats with decent leather would be a find.