These started in 1971 with the letter “A” prefix and so on.Interesting to know that in 1971 Mitchell also celebrated the 20-Millionth Mitchell reel manufactured in Cluses, France.1971 = A1972 = B1973 = C1974 = DMatching Serial Number stickers on boxes ended in 1974.Gaps between the serial numbers I give are ones I’ve not found and Please use this as a general dating guide only!The first four versions of the 300 called “The Mitchell” at the time did not have the 300/301 model number engraved.
Unfortunately almost all of these wrappers have been discarded but several have been found and documented, still in their original factory state.1953 – SN 40779 to 2035191954 – SN 235985 to 6177925th Version -SN 624001 was the earliest I’ve found.1955 – SN 624001 to 10042701956 – SN 1040182 to 15178871957 – SN 1520736 to 18832886th Version - SN 1889513 was the earliest I’ve found.1958 - SN 1889513 to 2225412NOTE: Between SN 1883288 and SN 1889513 marks the beginning of matching Serial Numbers on boxes.
My fresh water experience is limted to bass and panfish.
I cannot tell you where this originates, except that at one time, it was free information on the Mitchell Reel Museum."Dating a Mitchell reel is easy if you have the right tools and here it is; the original Mitchell Fishing Reel Dating Guide!
Between these two numbers I’ve documented regular 3rd versions with serial numbers as low as #B32817 and as high as #B42156.
Besides the serial number, they are easy to document as authentic with very unique parts within the Head including the Baffle Plate. This was the end of the standard half bail and the beginning of the 4th version with a full bail :4th Version 1951/52 – SN “C” Prefix was carried over with the transition period occurring in the very low “C” serial number prefix range.