Imperial 2 Blade
Folding Knife Tin
Goins Encyclopedia of Cutlery Markings, Second Edition (1998) by John and Charlotte Goins (DIGITAL) – Knife Magazine
1960s Imperial Crown England Tin Cap 2 Blade Folding Pocket Knife Hunting - Ireland
Vintage Pocket Knives - Canada
Imperial Collectible Folding Knives 2 Blades for sale
1960s Imperial Knife - Canada
Vintage Imperial Prov. R.I. USA Yellow 2-Blade Folding Pocket Knife 1956-1988
60s 2 Blade Knife