Many an argument can be made regarding the use of different tonewoods for the fingerboard/fretboard used on guitars ,both the acoustic guitar and electric guitar. We will explore the types of woods used by various builders and why they may or may not have been used and the reasons behind it.
The source-date code found on pots and speakers gives the manufacturer and date (roughly) when the components were made. It may have been some time before the part was installed at the factory, but it still provides a good approximation of when the gear was made. This is especially helpful on (less popular) gear that doesn`t have reliable serial#`s or other information to date them.
The source-date code will signify the earliest possible date that the instrument or amp could have been made. This isn't going to be exact, but it will give you a "ball-park" age. And remember, even the dates indicated by the pots aren't that exact. For example, if you buy a brand new CTS pot today, they are dated a month or two in advance! I don't know the reason for this, but it's worth mentioning.
The source-date codes are under the framework of the "Electronic Industries Association", which is a non-profit organization representing the manufacturers of electronic parts. The EIA source-date code is a numeric code, assigned and registered by the EIA. It can be stamped or marked on any product to identify the production source (vendor) and date of manufacturer. Source-date codes have been published by the EIA since 1924. The EIA can be contacted via mail: Electronics Industries Association, 2001 Pennsylvania Ave NW, Washington, D.C. 20006.
In either case, the code works the same. The first 3 digits on a pot, or the first 2, 3 or 4 digits on a speaker are the source or manufacturer code.
The remaining 3 or 4 digits are the date code. In 3 digit dates code, the 1st digit is the last digit of the year. On 4 digits date codes, the 1st and 2nd digits are the last two digits of the year. In either case, the remaining 2 digits are the week of manufacture (01 to 52). With this in mind, remember if the last two digits of the source-date code are greater than 52, you're not looking at the source-date code!
Also it's worth mentioning:
Grammar served in the Army during World War II, and upon discharge worked as an apprentice toolmaker at the Washington Naval gun factory at Shop #20. Grammar married his high school girlfriend, Ruth Burzynski, in 1944. Shortly after the war ended, 18,000 of a 24,000-strong workforce were laid off, including Grammar. The couple returned to their home in Franklin County, Illinois. Signed by Monument Records in Nashville, Tennessee, he scored with "Gotta Travel On", written by Paul Clayton. The song peaked at No. 4 on the U.S. Pop Singles chart and peaked at number five on the country chart in 1959. That same year, he became a regular cast member on the Grand Ole Opry. Grammar named his band after his most notable hit as The Travel On Boys. "Gotta Travel On" was used as the opening song by Buddy Holly on his final tour in January and February 1959, which ended in tragedy.
Grammar founded RG&G (Reid, Grammar & Gower) Company in 1965 with Clyde Reid and J.W. Gower. RG&G made the Grammar guitar from 1965 until 1968, when a fire consumed the factory in downtown Nashville. The company was then sold to Ampeg, and a new factory was erected down the street from the old one. The company was renamed Grammar Guitar, Inc. (GGI). GGI produced the Grammar guitar until 1970. His guitar was installed into the Country Music Hall of Fame in Nashville on March 1, 1969.
On May 15, 1972, Grammar and the Travel On Boys played at the rally in Laurel, Maryland where Alabama governor George Wallace was shot. Grammar and his band played the "Under the Double Eagle" march as Wallace mounted the stage to speak. After he spoke, Wallace mingled with the crowd, and Arthur Bremer shot a concealed handgun at the presidential candidate. The outcome was Wallace's paralysis, leaving him using a wheelchair for the rest of his life. "I've said all along, if they wanted to do something like this, they do it under these circumstances," Grammar said, weeping, after the incident.
Grammar also delivered the invocation for the Grand Ole Opry House opening on March 16, 1974.
In 1990, Grammar was inducted into the Illinois Country Music Hall of Fame, along with Tex Williams, Lulu Belle and Scotty, and Patsy Montana. Grammar suffers from a degenerative eye disease called retinitis pigmentosa. He became completely blind. On February 27, 2009, he was honored by the Grand Ole Opry for his 50 years as a member.
Grammar died on August 10, 2011, at 12:20 a.m. He was in Benton Hospital being treated for a long-term illness, which included suffering a heart attack in January. He was eighteen days short of his 86th birthday.