In a BF Vibrolux Reverbs you could have either Jensen, CTS or Oxford, the BF Super Reverbs had Jensen, CTS, Oxford or sometimes JBL, the BF Pro Reverb had Jensen, Oxford or Utah, .In the silverface era Eminence, Oxford, Utah and Rola were more often used and Jensen was phased out.Looking at the chart below we can see that there was a pretty consistent numbering scheme for the vintage tweed Fender Champs.Champion 800 (green tweed)* 01 to 1000 – 1948-49 Champion 600 5B1 (two tone) 01 to 1300 – 1948-49 1300 to 1700 – 1950 1700 to 5000 – 1951-52 5000 to 5500 – 1953 Champ 5C1, 5D1 (tweed) 5500 to 6600 – 1953 6600 to 8000 – 1954 8000 to 9999 – 1955 Champ 5E1, 5F1 (tweed) C00001 to C00800 – 1955 C00800 to C03100 – 1956 C03100 to C06000 – 1957 C06000 to C08800 – 1958 C08800 to C12500 – 1959 C12500 to C15500 – 1960 C15500 to C16800 – 1961 C17000 to C19000 – 1962 C19000 to C21000 – 1963 C21000 to C23000 – 1964 So we can see that a serial number of C 09556 is pretty close to the lower end for serial numbers for 1959 5F1 tweed Fender Champs.Next, (if applicable) look for the date code on the tube chart.If your amp dosen’t have a date code, flip the amp upside-down and check the transformers, and speakers for their manufacturer codes.There are several ways to determine when a Fender amp was produced.First use the cosmetic features to get a range of possible years.
there used to be a link on the Fender website for amp dating from the serial numbers.Combined with what we saw with dating a tweed Fender Champ by the tube chart and speaker code, I’m feeling pretty good that all of the various dating methods point to early 1959 for my amp.I wish I could say that I figured all this out on my own.Another method of dating a tweed Fender Champ is by serial number.
On my 1959 tweed Champ amplifier, the serial number is located right in front of the fuse cap.
On the inside of your vintage Fender amplifier there is a paper chart with the tube locations for that particular model. On the tube chart there will be a rubber ink stamp with two letters.