Yes they're forgeries, well actually they're not but allow me to explain; Guineas were last struck in 1813 before being replaced by the sovereign in 1817. For some reason the Victorians had an obsession with the 'Spade' type guineas (spade because of the shape of the shield, like a pack of cards), thus when it came to having gambling chips they soon put the design to good use and they struck tons and tons of brass imitation guineas (very crude in design, often the wrong size, of dates that were never struck, or dates that are wrong for the design). Which i believe is what you have there, gambling tokens, or imitation curiosities. Kinda like if you go to one of those gift shops in a city such as York, where you can buy replicas of medieval coinage. The Victorians probably sold them in 'memory of the good old days' which is the very inscription that quite a few surviving examples show on their reverse.