No.17 had an 0-6-0 wheel arrangement and was powered by an eight-cylinder diesel engine developing 330 bhp (250 kW) at 1200 rpm.

Transmission was via a torque converter and a jackshaft final drive mounted ahead of the leading coupled wheels.

It survived Ulster Transport Authority (UTA) ownership and entered Northern Ireland Railways stock in 1967 but saw little or no work before it was scrapped in mid-1970.

It had brass number plates with red backgrounds which bore a highly stylised "17" in the same manner as the NCC steam engines.

The initials "NCC" were applied to the side panels in shaded gold serif capitals.