Subject: Re: History of 155
Dear Mark,
I'm very sorry to hear of your sad loss. My sincere condolences.
Thank you for taking the trouble to provide this further information about 155 - fascinating stuff. Re Edward Farr Limited, a company of that name appears to have been wound up early in 1971:
http://www.london-gazette.co.uk/issues/45328/pages/2692/page.pdf. I hope this helps.
Best wishes,
Tim