By the serial number.
The Marlin model 24 pump action shotgun was produced by Marlin firearms company from 1908-1915.
The Marlin firearms company produced pump action shotguns from 1898(the Marlin model 1898)all the way up to 1985(The model 120 Magnum shotgun).during that time span Marlin made 17 different model pump action shotguns.
Your Marlin model 38 pump action 22cal rifle was made between 1920-1930.
The serial number will equate to a year.
I Think it is a model 28 Go to www.marlinowners.com/forums/ and post a pic. Or www.gunandgame.com/forums/ Or www.rimfirecentral.com/forums/ We'll be better able to tell you by the differences in stock/slide/etc :)
MARLIN GUN COLLECTORS HAVE A WEB SITE, GOOGLE IT
Some of the distinguishing markers to look for in a Marlin model 60 are whether the ejector is casted into the feedthroat and the firing pin style. By identifying these parts you can determine if the gun is an old style or a new style.
Marlin made these. That brings the value up. Sold my last one to a collector (Marlin) for about 950. It was old but mint and a great shooter
Your marlin model 1893 was made by marlin in 1904.
You do not state what model of marlin you have?I can say that if you have a model 1881,1888,1891,1892,1893,1894,or 1897 marlin with the serial number you provided it was made in the year 1900.
Your marlin model 39a golden was made by marlin in 1964.
your marlin model 1893 was made in 1897.