The closest comparison of an M-model 150 to a 152 is the very last year of the M-model. Not the '75 or '76 M-models, but the '77 only. It has the same flap switch and circuit breakers. Even then, it doesn't compare to the last year model 152 where the upper eyebrow section of the panel was changed, like Scott Keating's model. I believe his is something like one of the last 3 manufactured...and a super-fine original example at that!