I am totally not sure about the model number because it's almost completely gone but I've given you what I think I see. It's a 12 speed mens bicycle, bought it new over 10 years ago I would say. It had "BIOTECH" as one of the decals on a gray paint scheme. The BIOTECH decal was numbered 44X2566 & the large MURRAY decal was numbered 44X2567. I'm trying to make some modifications to this bike & it would be great to have the manual. Thank You, Glenn