® tins have been added to the collection and both are only half the size of my other tins (see below) at 73mm (2 7/8") diameter!
The bottom one is of the same era as my others but the top one is much earlier - the logo has an outline so you can actually see how the Sellotape® logo started out (made up from a ribbon of tape). The logo/brand name 'Sellotape' has not yet been registered as a Trademark and the company name on the side of the tin is Adhesive Tapes Ltd., not Sellotape Products Ltd. as it is on the later ones. I love how it describes what Sellotape® does too, again indicating that it is an early tin, "No moistening" and "Adheres at touch".
If you're craving more information about Sellotape®, there's a brief history of the brand here.