HB was a car made in two or three copies at Berglunds mekaniska verkstad at about 1925. On the prototype they used a three cylinder engine, but the production models had a four cylinder engine producing 16 horse power. The engine was connected to a three speed transmission

Transmission (mechanics)

A machine consists of a power source and a power transmission system, which provides controlled application of the power. Merriam-Webster defines transmission as: an assembly of parts including the speed-changing gears and the propeller shaft by which the power is transmitted from an engine to a...

. The car was a two seater

Coupé

A coupé or coupe is a closed car body style , the precise definition of which varies from manufacturer to manufacturer, and over time...

 and the design was much inspired by the Thulin A

Thulin A

Thulin A was an automobile made by Enoch Thulins Aeroplanfabrik between 1920 and 1925....

 by AB Thulinverken

AB Thulinverken

AB Thulinverken was a company in Landskrona, Sweden, founded in 1914 as Enoch Thulins Aeroplanfabrik by the airman and aircraft technician Enoch Thulin. The company became Sweden's first aircraft manufacturer. In 1920, Thulin also started manufacturing automobiles, which continued until 1928...

. The company was later renamed to Sörby mekaniska verkstad (SMV) and made travel trailer

Travel trailer

A travel trailer or caravan is towed behind a road vehicle to provide a place to sleep which is more comfortable and protected than a tent . It provides the means for people to have their own home on a journey or a vacation, without relying on a motel or hotel, and enables them to stay in places...

s.