Marlin Model 94 Serial Numbers

I just aquired a Marlin model 94 lever action. It is marked 25-20m and lists the patent dates as oct. 11, 1887, april 2, 1889, Aug. It has a serial number under the lever of 185. Marlin Model 94.32-20 caliber rifle. Model 94 rifle made approximately during the 1910’s-1920’s. Metal has a mostly brown patina with blue in the protected areas. What year was the Marlin Model 94 with the serial #1147027 produced? How old is Winchester model 94 30-30 and what is it worth? What would be the price to sell a.30-30 Winchester, which was bought 25 years ago?

I hope this helps all Marlin owners:
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Marlin Year of Manufacture
Marlin year of manufacture maybe determined from the following list of letter/numeral prefixs to the serial number; this coding only applies to serialized rifles:
1946-C
1947-D
1948-E
1949-F
1950-G
1951-H
1952-J
1953-K
1954-L
1955-M
1956-N
1957-P
1958-R
1959-S
1960 (August)-1961-U
1961 (August)-1962-V
1963-W
1964-Y,-Z
1965-AA
1966-AB
1967-AC
1968-AD, -68
1969-69
1970-70
1971-71
1972-72
Starting in 1973, the year of manufacture maybe determined by subtracting the first two digits of the serial number from 100:
Example: SN 2512345 would have been made in 1975 [100 - 25 = 75] and SN 94365295 would have been made in 2006 [ 100 - 94 = 06 (2006) ].
For Marlin Rimfire Rifles [non-serialized]:

Model 94

From 1962 thru 1968 Marlins rimfire rifles (other than the 39 series lever actions) used a two letter date code that was stamped on the barrel. This date code is different than the one already listed, as Marlin rimfire rifles (other than the model 39 series) did not have a serial numbers until required to by Law after 1968. The first letter of the date code represented the month of manufacture while the second letter indicated the year. This date code was usually stamped on the left side of the barrel just in front of the receiver. The first letter of the date code is as follows:
A = Jan.