box seat

a seat in a box at the theater, opera, etc.

Origin of box seat

First recorded in 1830–40

We then set out on our luvly drive, me on the box-seat of one of the Carridges, and the other pore fellers cramped up hinside.

Punch, or the London Charivari, Vol. 99, November 15, 1890 |Various
Simplex and the driver also took their places on the box-seat.

Pretty Michal |Mr Jkai
There were eighteen male passengers, besides the chap on the box-seat.

Robbery Under Arms |Thomas Alexander Browne, AKA Rolf Boldrewood
A tale is told of a coach approaching town, and the coachman asking his box-seat passenger p. 39if he had any luggage.

The Great North Road: London to York |Charles G. Harper

At last Romashov took pity and called to him, and offered him a place on the box-seat of his trap.

The Duel |A. I. Kuprin

box seat

a seat in a theatre box

in the box seat British, Australian and NZ in the best position