[Sticky] The naming of the Haenel 28 air pistol

The naming of the Haenel 28 air pistol 

John Griffiths, author of the Encyclopedia of Spring Air pistols, explains:

The Haenel Air Pistol... is a Haenal 28 made before Haenel needed to give it a number, and before they had introduced the cheaper Haenel 26. Obviously when the Haenel 26 came onto the market they had to come up with some means of differentiating them by name, so the "The Haenel Air Pistol" was called the "Haenel 28" (presumably because it was first sold in 1928), and as the cheaper model had to have a lower number, it was called the "Haenel 26". (They would not have wanted to call it the "27" as that name had already been used previously).