If you can track down the date code, simply refer to the following set of tables, which provide an accurate record of the date codes used throughout the years.
I've got a '65 (tube chart date OF) Super Reverb I've had since '66 new, one of my main two small/medium gig travel amps and yea it's got it's road worn look, but no harm. Though one speaker has Green dot sticker and the other a Red dot sticker. Both are the exact same speaker, but now I recall had to be re-conned some 30 years ago and has a repair label over the magnet with the donut label put back over the repair label (which I can't get off now). T2If you're asking T2Stratman on his sweet Triple A condition 65 BF Super Rev, I'd guess a small fortune.
The first of the three digits tells us the last digit of the year (unfortunately not decade specific) and the last two numbers tell us the week.
In the above example, the transformer was made in either 1966 or 1976, week 45.
Arjay So those top two "Plum" finish CTS 10's aren't as new (later 70's) as I thought, rather no younger than 1970. Glad to know that they are Oxfords, which I like the tone better than Utah's and the Jensen's Fender bought.
Were they only used in Silver Face models, because I don't recall ever seeing that color in Black Face amps, at least one's I've had the chance to use or check out. I have a Silver Face Vibrolux Reverb which I always thought was a 1976, silver grill cloth with tan interweave (no blue or orange) and it has what I think are Oxfords with kinda dark "Plum" or Brown anodized speaker frame bodies. I got this amp off the original owner, another session guitarist friend who wanted a USA made Kramer Pacer Custom guitar I had at the time back in the 80's.
Serial number on a Fender "sticker" on the back of the chassis is A33745. I liked those Pacers, but in the long run I really made out since the value of those Kramer's went flat and the SF 70's Fenders have taken off beyond belief.
Pictures below, the pics of the speaker is not easy to see the color, but it it decidedly a dark plum or brown anodized. I love this Vibrolux Rev as much as my 66 Twin Reverb .... The VR is a tremendous small venue amp, mic'd or not.
The CTS alnico version may be found in the Vibrolux Reverb, Super Reverb, and Super Six Reverb. And yes it is all original except one CTS speaker was changed for an oxford (currently looking for a CTS Ceramic Replacement from 65! Thanks for the confirm, the numbers you saw are correct.The codes are added on the production line and are placed on the speaker's chassis leg, on the front gasket or on a label on the magnet edge.In recent times this information has also been reproduced on the barcode label stuck to the outside of the speaker packaging.If your tweed champ is stamped HH, it was made in 1958/August.A – 1951 A – January B – 1952 B – February C – 1953 C – March D – 1954 D – April E – 1955 E – May F – 1956 F – June G – 1957 G – July H – 1958 H – August I – 1959 I – September J – 1960 J – October K – 1961 K – November L – 1962 L – December M – 1963 N – 1964 O – 1965 P – 1966 Q – 1967 Another way to get a close estimate of when your amp was made is to read the codes on the transformers. 064121 and another that is partially covered by the Fender donut label is I think a 5 or 8 then 749. The last time I had the Tech change out the top two was around 71 or 72. Do you know when was the last time CTS used that bronze/plum colored frame finish? Checked the bottom speakers, there are no numbers of any kind on the frames and onlu one can you see numbers on the magnet. Here is a link for looking up the EIA codes for speakers. the way, I just edited my post, I notice your '65 BFSR is a brother to my '65 (also an OF)..are a couple pics of it... The last time I had the Tech change out the top two was around 71 or 72. Do you know when was the last time CTS used that bronze/plum colored frame finish? Checked the bottom speakers, there are no numbers of any kind on the frames and only one can you see numbers on the magnet.The tube chart date code works like this: the first letter indicates the year and the second letter indicates the month.So if your blackface amp has a date code stamp of OB, it was made in 1965/February.There are some exceptions and some overlap, but the general idea is this: Tweeds (early 50’s to very early 60s), Browns (1960 – 1962), Blondes (1962 – 1963), Blackface (1963 – 1967), and Silverface (1967 – 1981).Up until the end of the blackface era (1967), all amps left the factory with a tube chart that had a two letter date code stamped on it.