Are all adjustable sighted New Model mid-frame BHs flat top?

I want to be able to quickly recognize whether an adjustable sighted New Model BH has a large or mid frame. If all adjustable sighted large frames' sights are nestled between raised sides of their top straps and all New Model mid-frame BHs are flat tops it is easy. I realize trying to find hard and fast rules about guns usually just draws out the exceptions but the rules are still useful if the exceptions are scarce variations.

Yes...they are all flattops.

Thanks for the quick answer Jim. I guessed this would be an easy question for BH collectors.

There are large frame FTs. The 50th Anniv 44's and the Williams 41's come to mind.

Sugar River has the two exceptions correct which are both non-regular production exceptions. If it's a flat top NM, it's a large frame when the caliber starts with a 4 and ends with Magnum. Otherwise it's regular production and a mid-frame including all New Vaqueros (fixed sighted).