I think this is a 78 free spirit mx-3 but im just guessing. there is a sticker om the downtube that says sears & roebuck co 2-78. Has the free spirit sticker on the headtube. it also has a 3 speed grip shift. Appears to have had some other red plastic bits bolted on in the past there are two little tabs near the rear fender broke off and being held on by sheet metal screws.
If anyone knows what model this is or has pictures of a complete one that would be really groovy. Thanks!