The Abas Major air pistol's were made for less than two years immediately after the second world war. Less than two thousand were made, the highest known serial number being in the upper eighteen-hundreds. They were made by a very highly respected shotgun making company in Birmingham, Andrew Brown and Sons (hence the name ABAS) as a stop-gap measure. They could not get the type of steel they required to make their shotguns, so rather than lay off their workers, they turned to air pistol production temporarily.
Even though the ABAS was only made for a very short time, in very small numbers, the quality it was made with, and the excellence of the design itself is so high that they are very sought-after by collectors over fifty years later. What a testament to the high standards of Andrew Brown and Sons. Incidentally, the firm is still in existence.