
Boss & Co is one of my favorite gunmakers–and for good reason. Not only have they made some of the most beautiful and finest shotguns and rifles ever, but during their Robertson era, they were also innovators. One of their greatest creations was the Boss single trigger, developed by Robertson in the 1890s.
To show off the effectiveness and reliability of his new singles triggers (and of his firm’s gunmaking skills), Robertson had Boss & Co build a couple 3-barreled SxSxS shotguns. Of the ones they made, this is the only one still around. Asking price: $333,333.00
The following is from an email Griffin & Howe sent me about it this gun:

“As a promotion for his single trigger, Robertson engineered among the most important shotguns to emerge from the Boss & Co. London workshop in the company’s 205-year history: the triple-barrel SxSxS that incorporated a single trigger. Although a marvel of ingenuity, the shotgun actually reveals the lengths that Robertson went in order to demonstrate the feasibility and safety of the single trigger to a skeptical marketplace.
Robertson certainly wasn’t the first gunmaker to experiment with a single trigger. Single-trigger sporting guns had been tinkered with by various gunmakers as far back as the late 17th century. An array of patents had been filed for them in England. Between 1893 and 1895, however, Robertson had applied for three single-trigger patents, each more sophisticated than the previous. By 1894, he had successfully demonstrated the single trigger on a side by side to the sporting press in London.

Still, Robertson must have felt that he needed to do more in order to validate his single trigger. Thus, over a two-year period, he set about building a 12-bore prototype, triple-barrel, SxSxS shotgun that relied on the single trigger.
Understandably, it is extremely difficult and expensive to make such a gun. Nonetheless, it was Robertson’s way of “cocking a snoot” at the London gun trade who had been trying to verbally undermine the flawless operation of the Boss single-trigger system.
The first SxSxS prototype of the Boss & Co. was a 12-bore built in 1898 with serial number 4605. Since it was never actually ordered, no reference appears in the Boss Order Ledgers. Number 4605 was subsequently sold to a Mr. Herbert Lawton on July 3, 1922 (24 years later). Mr. Roy Lyu, former General Manager of Boss & Co, Best Gunmakers, reports it was lost in a house fire while in the custody of Lawton.
On July 3, 1899 Boss & Co. was commissioned by Signor W. Baldi of Florence, Italy to build a 16 bore SxSxS shotgun that fired with the famous, patented single trigger design concomitant with the Boss & Co name. This gun was completed on June 21, 1901 bearing serial number 4690. The length of delivery time confirmed the complexity of the build process.

With the loss of number 4605, 4690 is the world’s only known enduring example. It has been entrusted to Griffin & Howe for sale, marking the first time the only 16-bore SxSxS has become generally available. The overall condition and considerable amount of case color remaining belies its 117 years of age. It is offered at $333,333.33.00
For more information, visit Griffin & Howe’s Three Barrel Boss page.