1936 Leyland Tiger TS79919 GSRFC30F (whatever that means !) constructed by Great Southern Railways. Scrapped in 1949. Registration AZ7185.
Yes, that's correct - it's a Leyland Tiger TS7 with a GSR FC30F body built by/for Great Southern Railways in 1936.
The FC30F stands for -
F - full front (as opposed to half-cab)
C - coach
30 - number of seats
F - front entrance
Great Southern Railways owned and operated all the railways within the Irish Free State from 1925 to 1945.
They also had a large bus fleet operated from 1929 until the The Transport Act of 1944 that dissolved the company and transferred its assets (together with those of the Dublin United Transport Co.) to Coras Iompair Eireann on 1 January 1945.