#0847

Caledonian Railway 721 Class

🇬🇧 United Kingdom ·built by St. Rollox railway works· from 1896· class of British 4-4-0 locomotives

2 photos from Wikimedia Commons · credits & licences

1. Caledonian Railway 721 Class: Mr. Forbes· Public domain
2. CR 721 Class 724 (1912): Unknown photographer· CC BY-SA 3.0

what is it?

The Caledonian Railway 721 Class (known as the "Dunalastair" class) was a class of 4-4-0 steam locomotives designed by John F. McIntosh for the Caledonian Railway (CR) and introduced in 1896. Taking their name from the estate in Perthshire owned by the Caledonian's then deputy chairman, J.C.Bunten, all survived to be absorbed by the London, Midland and Scottish Railway (LMS) in 1923 and a few survived into British Railways (BR) ownership in 1948.

who runs it

Caledonian Railway London, Midland and Scottish Railway British Rail

base stats

built 15made in total

Bars compare against all trains: 600 km/h (maglev), 1,700 seats; power, weight and number built on a log scale up to 20 MW, 1,000 t and 20,000 built.

fun facts

First built 130 years ago, in 1896.
Served for 39 years (1896–1935).

steam locomotive: Burns coal, wood or oil to boil water; the steam drives pistons that turn the wheels.

spec sheet

built: 1896
in service from: 1896
retired: 1935
status: retired
number built: 15
kind: Steam
traction: steam
origin: 🇬🇧 United Kingdom
builders: St. Rollox railway works
designer: John F. McIntosh
operators: Caledonian Railway, London, Midland and Scottish Railway, British Rail
top speed: —
power: —
gauge: 1,435 mm standard gauge
wheel arrangement: 4-4-0

From the Wikipedia infobox and Wikidata. Blank means the sources don't say.

Sources: Wikidata Q16987453, Wikipedia: Caledonian Railway 721 Class (CC BY-SA 4.0).Updated 2026-10-25.