The Fender Bassman Amplifier has gained a reputation for being the go-to amp for both electric guitar and bass players.The warm tube sound was introduced in 1952 when the first Bassman model was designed for Fender Precision Bass guitars.He recalled, “We just went to a big bin every morning and loaded our wheeled rack with a batch of whatever chassis we were working on that day.
Well, this universal “truth” was debunked when we found a bunch of amps with transformers made by the Better Coil and Transformers company.It will usually be printed on a 4- by 4-inch sticker placed near the tubes in your amp. From 1953 to 1967, this was a two-letter stamp that corresponded with the month and year the amp was manufactured.For instance, if the amp was manufactured in March of 1955, the serial code would be EC. This two-letter production stamp continued in 1990 when Fender began reissuing Fender Bassman Amplifiers.Here is a comprehensive table for identifying the production stamp: A - 1951, 1990 B - 1952, 1991 C - 1953, 1992 D - 1954, 1993 E - 1955, 1994 F=1956, 1995 G - 1957, 1996 H - 1958, 1997 I - 1959, 1998 J - 1960, 1999 K - 1961, 2000 L - 1962, 2001 M - 1963, 2002 N - 1964, 2003 O - 1965, 2004 P - 1966, 2005 Q - 1967, 2006 A - Jan B - Feb C - Mar D - Apr E - May F - Jun G - Jul H - Aug I - Sep J - Oct K - Nov L - Dec If you are unable to find the production stamp, find the serial number that is also printed on the tube chart.
Here are the serial number schemes from 1951 to 1970. 1951 - BM00001 to BM00550 1956 - BM00550 to BM01200 1957 - BM01200 to BM01600 1957 - BM00001 to BM00400 1958 - BM00400 to BM01500 1959 - BM01500 to BM03100 1960 - BM03100 to BM04600 1961 - BP00100 to BP01100 1962 - BP01100 to BP05000 1963 - BP05000 to BP08400 1964 - BP08400 to BP12000 1964 - A00100 to A03800 1965 - A03800 to A15000 1966 - A15000 to A33000 1967 - A32000 to A40000 1968 - A39000 to A49000 1969 - A48000 to A58000 1970 to 1983 - A58000 to A60000 The Bassman was discontinued in 1983 until Fender re-issued new versions of the 50s and 60s Fender Bassman models in 1990.
It’s unknown if the tweed covering was a mistake (“Oops, I thought this was a 4x10 Bassman cabinet that I was covering”) or intentional, perhaps as a special order.