Now one of the most popular brands on the collector market, Quiralu was at one time a totally obscure French brand of diecast toys. Their current popularity is due in part to the re-issue of many of the original models as faithful reproductions. That alone wouldn't necessarily make them sell, but the real reason is for the recognition by collectors of the charm and quality of these fine toys.
Reproductions can be purchased for a very reasonable price, while original models are quickly rising in value. The original Quiralu brand was introduced in 1933 by Émile Quirin of Luxeuil les Bains, France. The combination of his name and the primary metal (aluminum) used in the production of these models provides the name derivation. It wasn't till 1955 that the firm started producing 1:43 scale models.
The latest of the original models were introduced in 1959, with production ceasing soon afterward in 1961.
What's it worth? Take a look at this Quiralu price guide: sold listings for a value indication.