hey guys, what does the model # on seatbelts tell me. I think the first digit means standard or deluxe. what does the rest mean. I think it means rear,front,or shoulder,or am i wrong? my numbers are 277 , 237, 231. Just want to know:confused: . thanks for any help.

model 277 is a 68 front shoulder belt, 237 is 68 front lap and 231 is 68 rear lap. These are all standard belts with plastic covers.