Bill, It's NAPA part number SL 136. Here's the scoop. My 58 uses the same thing. You cannot get an exactly correct brake light switch for these cars anymore. But the SL 136 works just fine, with an adapter. Check your master cylinder and you may find that it already has the adapter fitted. If not get one that the switch will screw into that takes the screw size up to the next smallest size. That's what I told my NAPA folks and they knew exactly what I meant - even if I didn't - and then it turned out I had the adapter anyway. You need this one to have the correct male and female electrical fittings. With the adapter in place its just about impossible to see. All you can see is an additional hexagonal nut, very thin, as the top part disappears into the master cylinder, and the brake switch encompasses the bottom part of the adapter. Hugh > Anyone know where to get one of these. My mechanic thinks it is the reason my > tail lights won't turn off, and after see the smoke coming out of it I do to. > Thanks, Bill '59 Crown >