Note, too, that any pack with Goodall courts and a Waddington AS must be after 1943, when the courts were transferred for printing by the Leeds firm after De La Rue's Bunhill Row factory was destroyed in the Blitz.
So, let's summarize: De La Rue before becoming a limited company: 1832-98.
De La Rue became a limited company in 1898 and Goodall in 1897, so any indication of that status (Ltd or Limd) must be after those dates.A suitable starting point would be the sources we can use in dating any particular pack.These are in essence endless: all kinds of external events can be relevant, such as the period of World War II, when in Britain there were severe restrictions on printing.De La Rue after becoming a limited company: 1898-1970.Goodall before becoming a limited company: 1820-1897.I give below the 7S index of each type: 3 - 3a - 5. Registered Trademark appears on the Goodall AS after the take-over from c.1925 onwards.(The earliest dated example I have of Registered Trademark on the AS is 1926.) Goodall's Camden Works were sold in 1929, so any reference to it on boxes indicates a date of manufacture earlier than that.Creative Loom Band Printable Valentines | The Crafted Sparrow Printable Valentines | Craftaholics Anonymous EOS Lip Balm Valentines | Dawn Nicole Star Wars Valentines | The Idea Room Eraser Valentine’s | Mama Miss Classroom Valentine Printables | Petite Party Studio Shopkins Valentines | Hello Splendid Free Printable Valentines | Polka Dot Chair Kool-Aid Valentines | The Crafted Sparrow Doghouse Valentines | Positively Splendid Printable Lip Balm Valentines | Thirty Handmade Days Such a Smartie Valentines | Catch My Party Race Car Valentine Printables | Made to be A Momma Popcorn Valentines | Whipperberry Printable Valentine’s Treat Tags | Yellow Bliss Road Nail Polish Valentine | Simply Kierste Printable Airplane Valentines | Skip to my Lou Cereal Valentines | Smashed Peas and Carrots Cutie Oranges Valentines | It’s Always Autumn Valentines Day Bookmarks | Living Locurto EOS Lip Balm Valentines | Simple As That Dinosaur Valentines | Messes to Memories via C. EOS Lip Balm Valentines | Skip to My Lou Loom Band Printable Valentine’s Tags | The Crafted Sparrow Gem Valentines | Dimple Prints Flashlight Valentines | SOHO Sonnet Printable Punch Balloon Valentines | Paintbrushes & Popsicles Bubble Gum Valentines | Live Laugh Rowe Gem of a Friend Valentines | Bloom Designs Printable Bullseye Valentines | Positively Splendid Cola Gummy Valentines | The Crafted Sparrow Emoji Printable Valentines | Landeelu Free Printable Star Wars Valentines | Paper and Pastiche “You’re ex STRAW Special” Printable Valentines | It’s Always Autumn Star Wars Valentines | Pink Cake Plate Fruit Valentines for Kids | Live Laugh Rowe EOS Lip Balm Valentines | The Country Chic Cottage Star Wars Valentines | Simple Splendor Jump Rope Valentine | The Crafted Sparrow Highlighter Classroom Valentine | C. Then there are the known dates of the individual makers.These can be found in my book and some details are on the plain backs website and elsewhere on the wopc website.