Help ID-ing older hammer Ithaca 10 bore

[Old and Reliable]

Or, for that matter, a Butcher or a Candle-stick Maker either. Good friend and Master Gunsmythe Brad B. ID'd this as a Ithaca NIG A grade and the serial number makes it 1904- So, when it goes up for official sale (with fotos) as it was made after 1896- need to ship via FFL route- price will be close to 4 figures (the barrels are without pits, dents or dings and the mechanicals are correct too) and a five day shooting with BP short 10 gauge loads inspection return option will come with- stay tuned for more details-

This has the rear mounted hammers- like the Baker Ithaca Mike McIntosh shows in his 1989 book "Best Guns" but it also has the curved "Ram's horn" side bolsters as do the hammerless Crass series Ithacas- a "puzzlement" to me, not being an Ithaca-er-- but if anyone in my ken knows, it would be Brad-