We had a neighbour with a western boler same model as ours it had the flat inset door. Other differences it was lower to ground but the may have been the springs and was 2 1/2" shorter in overall length, side widow at sink swung out like yours instead of slider,
awning like yours instead of roll out, only one power vent, rest of layout was exactly the same as ours right down to the 4 burner oven. 1978 RGW 1700