sears garage door opener
I recently bought an older house with a 1/2 hp sears garage door opener and unlike the other people in this forum I am trying to find the manual for this model (139.18600sr) Now I know it is very old but it still works and am not sure of the last 2 letters of the model number.The digital transmitter part no. is 139.18718 and the reciever is 41A3516-2. Unfortunatley I have nothing else to go on and sears is not much help since they only have the most recent models.Some of the other members in this forum have some of the numbers which match mine but not the model unit itself. Can you help me track down the manual?