Where these made on a 16 gauge frame?

My guess is yes, but I don't have one readily available to compare.

I believe so. I have one at home, could compare to a Browning 12 but that is about as far as I can go.
C.G.B.

Thanks for the replies Stonecreek, cgbach.

If it is the Remington made, under licence, version of Browning's "Auto-5" then yes.

I definitely saw one many years ago here in UK in 16 Gauge.