Since one very kind member offered me the sale of a Black'n'Tan number 141 I have started reading, with interest, of the use of this loco on the Derry Road.
From the book 'The Derry Road' by Des Fitzgerald it shows No. 159 at Carrickmore heading for Omagh dated 13th July 1964 stating it was the last year of operation of this service. Therefore No. 165 would most certainly not have been in Omagh.
My good friend, the late Norman Johnston, who captioned the book notes that the locos were first introduced 13th Dec 1962 so it is more likely that No. 141 came this way.