The 2 7/8″ 10 gauge is a load lost to time. Back in the late 19th century, it was the most popular load in this country and lots of American double barrel shotguns were made to shoot it. But as powders improved and shooting styles changes, more and more hunters swapped their 10s for 12s.
By the beginning of the 20th century, the 10g was pretty much obsolete. While a few were still made, it was a vanishing species. It would be revived a bit when 8 gauge shotguns were banned by the Feds and Ithaca introduced its 3 1/2″, 10g to fill the gap, but it would never reign supreme again.