This is a brand new Aluminum rear sprocket for 1974/75 MX175A/B. It's 47 Teeth, 428 chain. Brand is unknown. It's offset instead of dished.There are people that sell spacers to mate with these to replace harder to find Yamaha OEM dished sprockets.May fit other years (like 1978-80?) and models (DT 125, 175?) but please do your own research and ask questions before buying.I Bought this years ago as spares for MX125C projects but no longer needed. Stud holes are not sized for 1976 YZ125C or 1976 MX125C but could be drilled to match. I only ship to lower 48 United States, please do not offer if you are outside lower 48. Please ask all questions before offerding. I answer all questions quickly and honestly. Please note: I am not selling these parts as a business, but just trying to recover some of the $$$ I invested in my motorcycle hobby over the years. I try my best to give accurate information and clear pictures, but I am human and can make a mistake. If I have made a mistake in a listing description or shipped you the wrong part, PLEASE contact me immediately so I can fix the problem to your satisfaction -BEFORE- leaving bad response or using Resolution Center. I will normally leave Positive response for you once I know you are happy with the purchase and have left response for me. Payment by Paypal only. NO credit cards or checks, etc. Thanks for looking at my sales and Happy Roosting!