The Caledonian Railway 670 Class was a class of 0-4-2 steam locomotives designed by George Brittain for the Caledonian Railway (CR) and introduced in 1878.
Ownership changes
Nine locomotives were withdrawn in 1922, or earlier. Twenty-one survived into the ownership of the London, Midland and Scottish Railway (LMS) in 1923; these were withdrawn between 1923 and 1932.
Numbering
{| class="wikitable"
|-
! CR nos.
! Quantity
! LMS nos.
! Notes
|-
| Various
| 7
| 17000-17006
| †
|-
| Various
| 14
| 17007-17020
| ††
|}
;Notes
- † locos with 140 psi pressure
- †† locos with 150 psi pressure