Hi - yes, I think it's BT 52/909 that we need - at least I shall find out if that's wrong tomorrow when I get there but hope not.

The range of Nos. 683936 to 684094 obviously includes your 684000, and that whole group will be shown within one Representations book - some of the books are immense and very heavy, and the leather on some of the C19 books suffer from 'red rot' - a breakdown of the leather where it becomes dry and powders. This doesn't do white shirts a lot of good.
Representations books are the locations for all the pix, photos, drawings etc., that show an image of the item in some form or another, plus the Registration No. is stamped or shown in some way on the image. The Registers are those books that include the text only - they detail the name of the Registrant, address, usually the CLASS of the item, and sometimes give a very brief description. The Kew Register Reference for your item is BT 53/42, and I'll have a squint at this too should there be any additional information that we might consider of interest.
As you can imagine, the total material of the Kew archive for Patents, Trade Marks and Registrations is truly vast, and most of the stuff we want relating to Registrations isn't available down to item level, so at best we need to order up the books covering, usually, a large number of Registrations which we know will include the item we want to research, so this always means a visit to Kew.
does this help you to understand a little of how TNA system works?
