However I did some detective work on the company and they were around in the late 1920's
Ludgate Co of 76 Hanover Street, Edinburgh, Scotland. Telephone: Edinburgh 25597. Cables: "Ludgate, Edinburgh"By 1942, they appear to have moved to a different address in Edinburgh.
1929 Advert as Loose Leaf Book Manufacturers. Also Postape, Scotia, Hanover and Lockfast Ledgers, Dunsol and Eclipse Thong Transfers. Pro. and Non-Projecting Post Binders. Prong, and Ring Binders, Memo, and Price Books. The "Aristocrat" of Loose Leaf Books. (Stationery Section - Stand No. R.106)
Once again thank you to John B for sharing this with us.