Rare vintage slacks 30x34

Pre-owned vintage wide leg trousers in great condition! 1970’s possibly? Brand is Contact Slacks by Miller. Beautiful brown/orange checkered pattern with cuffed bottom, wide front belt loops, and metal clasp closure. Unsure of material. Possibly a poly/cotton blend, very light weight. No defects other than normal wear. 34.5” inseam 30” waist