The 16-bore was introduced in 1901, according to old company literature; so this means that SAC made their 16's on all three frame variations. I have no idea how many SAC 16's were produced, although I can tell you that the SAC 16 is seldom seen; and also that SAC 16's, though uncommon, are many times more common than SAC 20-bores. SAC did offer their 16-bore in all hammerless models from Grade 00 all the way thru their highest Grade D gun. I believe I recall that the Grade 00 gun carried a retail price of $30 in the 1903 catalog; just one dollar less than than the Grade O gun with Twist barrels (the only difference between the two grades).
Enjoy your SAC gun (and I believe that patent date is 9/26/93).
