100yrs of SER - Steam Locomotive No. 691 --- On 28th 1987, IndiaPost issued a set of four stamps on the occasion of Centenary of South Eastern Railway. This 150 paisa stamp features a narrow-gauge PL class steam loco No. 691 built by Kerr, Stuart & Co. Ltd. London, UK in 1925. This loco ran on the narrow-gauge Parlakhemundi Light Railway, having 0-6-4 wheel configuration. This loco is currently plinthed outside Southern Railway HQ in Chennai.