No,not that I am aware of. Browning makes a Challenger mark III, but that is a .22 lr pistol. Browning also makes the Hi-Power which is chambered for 9mm Luger.
You have a Nomad model which was made in 1967. These guns were similar to the Challenger and Medalist.
http://www.gunbroker.com/Auction/ViewItem.asp?Item=102652396 They're around.
Browning now offers historical letters.
1969. During the early part of 1969 Browning serial numbers for the Challenger ended in "U9". At about serial number 134820U9 Browning began to use the two digits "69", perhaps starting at 500 and continuing to at least 26880U69. 28907P70 is the earliest number that I know of for a 1970 model. Serial numbers for the Nomad (designated "P"), the Challenger (designated "U" ) and the Medalist (designated "T") were comingaled for any given year from 1962 to 1975 .
The 7.65 automatic pistol cartridge is also commonly known as the .32 ACP, or for short, .32 Auto. Any browning pistol chambered for .32 ACP uses 7.65.
I would need to know the Browning model number besides the serial number to get you any info on your semi-auto browning pistol.
Can you please re-phrase your question? Serial number 16-16189 does not exist on any Browning. What type of gun is it? ie: Shotgun, rifle, pistol? the "16-" does not compute.
0-multiple thousands depending on EXACTLY what you have, any history and provenance it may have and condtion.
Any handgun that is not a revolver is a pistol- so, yes, there are .22 pistols. They include single shot top break pistols, derringers, and automatic pistols. The last category includes the makes of Ruger, Colt, Browning, High Standard, Smith & Wesson, and dozens of other makers. The link below is to a photo of a Browning Buckmark pistol- caliber .22 LR.
After the challenger explosion it did not operate any more missions.
No way to answer without a detailed description of ALL markings, finish, condition, any accessories, box, papers, caliber, etc.