Try oldguns.net
try the military forum on gunbroker.com they will help you on this
Between May 1943 and February 1944.
To determine the manufacture date of a Universal Enforcer 30 cal carbine pistol with the serial number 159193, you would typically need to refer to the manufacturer’s records or contact a firearms expert or collector who specializes in Universal firearms. Universal Firearms produced these carbines primarily in the 1960s and 1970s, so the date is likely within that range. However, specific serial number databases or manufacturer documentation would provide the most accurate information.
.22 cal
Around 1886.
No way to answer without a maker and serial number.
1892
32 cal. ?? made 1918
if a 32 cal. made about 1917
1915
You will have to cal S&W
1912