Het is inderdaad een soort 'gig', tweewielige koets, ook wel sjees genoemd. Hier zijn diverse modellen van en ik zou de Engelse versie gewoon laten staan, met erachter tussen haakjes zoiets als 'soort sjees' of 'tweewielig rijtuig' of i.d.
Meer uitleg op Wikipedia:
"Gig (carriage)
From Wikipedia, the free encyclopedia
A gig, also called chair or chaise, is a light, two-wheeled sprung cart pulled by one horse.
[edit] Description
Gigs travelling at night would normally carry two oil lamps with thick glass, known as gig-lamps. Gig carts are constructed with the driver's seat sitting higher than the level of the shafts. Traditionally, a gig is more formal than a village cart or a meadowbrook cart. A light gig can be used for carriage racing. OED gives the date of first known reference to a horse-drawn gig as 1791. There are several types of gig, including:
* calesín: small, one-horse, hooded, a seat behind for the driver, used in the Philippines; diminutive of Spanish calesa
* stanhope: typically having a high seat and closed back; named after Fitzroy Stanhope, a British clergyman who died in 1864.
* stick gig: lightweight, two-wheeled, for one person
* Tilbury (carriage), lightweight, two-wheeled,
* whiskey or whisky: small body that resembles a chair, suspended on leather braces attached to springs."

"One-horse shay
From Wikipedia, the free encyclopedia
(Redirected from Whiskey (carriage))
The one-horse shay is a light, covered, two-wheeled carriage for two persons, drawn by a single horse. It is the American adaptation, originating in Union, Maine[1], of the French chaise, and is also known as a whisky as its owners tended to whisk about doing errands. The body is chairlike in shape and has one seat for passengers positioned above the axle, which is hung by leather braces from wooden springs connected to the shafts. It is colloquially known as a one-hoss shay."