Too tough to say what model it is. Coach green is not a sparse color. Front fender is Schwinn, for the style paint potentially 51 or below but wrong color for this green frame. Rear is not Schwinn rest is pretty obvious mis-matched parts. IDK is that fork cap, like a huffy or, on a Schwinn fork? Looks like it. wrong chain ring, while the head set looks Schwinn. Are the rims Schwinn? hard to see. But if they are s-8's then frame probably goes newer than 54. Potentially a Hornet which could be lower end Coach Green or higher color choice for green Opal or Radiant. Coach Green continued up too around 1960, it just wasn't as preferred or desirable as it was in older models by then. Regardless, at this stage, anything U want it to be.