Looks more versitile than the sheepsfoot/sheepsfoot /pen/pen bladed things most others produce.
The curvature of the handle does not appear as severe, either. Might be more comfortable in hand. (I find the "standard" congress pattern's reverse curve quite uncomfortable in my hand. Obviously others disagree with me ... the congress is and has been a relatively popular pattern for at least 163 years and counting.
Former now late President Abe Lincoln carried one.
I don't know what his generals carried for their pocket cutlery. No doubt some took a page from the then Former and late President Geo. Washington, and toted a Barlow.
The Calvarly and Artillary officers (and troops) may have carried a precurser to the Harness Jack, for the punch?
I may gave to find one of these. The (offshore) Imperial congress I had hurt my hand, so I gave it away, long, long ago.