A portion of this post summarizes a question posted elsewhere:

http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=185115

"The Trulock & Harriss company was based at 9 Dawson St, Dublin, Ireland. . In 1892 John Rigby was moving his Dublin operation to London and Trulock & Harris purchased the Dublin works of the Rigby company at 24- 64 Suffolk Street.

There was also a London branch at one point ?? which may or may not be Henry Trulock Harriss, 22 Bury Street, St. James, London 1909 to 1911-1916 of which Lagopus refers.

The company ceased trading at its Dublin address in 1914, to the best of my knowledge."

I've seen the home page of the company you refer to, I suspect this is an entirely new not related
firm, who am I to say.

Again thanks for the interest and information, I'll take all info I can get.