Below, a gentle overview of original Celestion blues of known date in AC30s - in this instance, AC30/6s with copper panels.

Some preliminary notes:

(i) where component date codes in AC30s are concerned more generally, speakers are almost invariably the latest, sometimes a matter of weeks later than the latest date codes in a chassis, occasionally as much as three months;

(ii) the date codes are NOT the date of the amp - they simply record the day on which the speakers were manufactured at the Celestion Works in Thames Ditton;

(iii) there is in most cases no firm evidence to indicate how long the speakers sat on shelves at Celestion or JMI before being fitted in an AC30 (final assembly);

(iv) remember that prior to the final assembly of an AC30, chassis, speakers, and cabinets were simply stock parts sitting on shelves, useless on their own.

(v) final assembly was not the end of the process though. Thereafter the amp would be tested, and only after that a serial number plate stamped (by Jack Jennings) and affixed.

(vi) reckon on adding three to four weeks *at least* to the date of the speakers to allow for final assembly, testing, and the assigning of a serial number by Jack and his team. In some instances, getting the amp ready will have taken longer.

The list below is by no means comprehensive, necessarily just a series of "stepping stones" if you like - further material to be added in the coming days and weeks. In some instances, only the RIC cone codes are known for some speakers at present. As these codes tend to go in alphabetical sequence by date, links have been provided to the main overview page here.

Links to the page on Pulsonic cones in Celestion blues will be slipped in where possible.

Just to note that speakers were produced in batches, those batches/orders brought to readiness over the span of a few of days. Do not expect to find a Celestion blue for every day of the year. Further notes to be provided shortly.

Final assembly, testing, assigning of serial number - 1960

4072 - 02BE - 2nd February 1960.

Final assembly, testing, assigning of serial number - 1961

4447 - 27DF - 27th April 1961.

4478 - 15EF - 15th May 1961.

4606 - 16FF and 29FF - 16th and 23rd June 1961.

4715 - Ric cone code - July/August 1961.

4784 - 03LF and 10LF - 3rd and 10th November 1961.

Final assembly, testing, assigning of serial number - 1962

4981 - 22FM (should be 22MF) - 22nd December 1961.

4988 - 22FM (should be 22MF) - 22nd December 1961.

4995 - RIC cone code known, Dec. 1961 - see this page.

5002 - 22FM (should be 22MF) - 22nd December 1961.

5169 - RIC cone code known, early 1962 - see this page.

unknown - 24EG - 24th May 1962.

5327 - 24EG - 24th May 1962.

5329 - RIC cone code known, May 1962 - see this page..

5392 - 14FG - 14th June 1962.

5482 - RIC cone code known, May/June 1962 - see this page.

unknown - 20JG and 21JG - 20th and 21st September 1962.

5786 - 21JG - 21st September 1962.

5801 - 27JG - 27th September 1962.

Final assembly, testing, assigning of serial number - 1963 (to late spring)

6000 - RIC cone code known, early 1963 - see this page.

6097 - 31KG and 08LG - 31st October and 8th November 1962.

6364 - 04MG and 18MG - 4th and 18th December 1962.

6372 - 18MG - 18th December 1962.

unknown - 11AH and 15AH - 11th and 15th January 1963.

6529 - RIC cone code known, Jan./Feb. 1963 - see this page.

644x - 14AH and 15AH - 14th and 15th January 1963.

6534 - 31AH - 31st January 1963.

66xx - 28BH - 28th February 1963.

674x - 19CH - 19th March 1963.

6758 - 16CH and 19CH - 16th and 19th March 1963.

6887 - 03DH - 3rd April 1963.

6890 - 09DH - 9th April 1963.

6920 - Pulsonic cone code: 8H1777, April 1963 - see this page.

7205 - Pulsonic cone code: 15H1777, early/mid May 1963 - see this page.

7917 - Pulsonic cone code: 19H1777, autumn 1963 - see this page.

8243 - Pulsonic cone code: 18H1777, autumn 1963 - see this page.

8775 - 17KH and 07LH - 17th October and 7th November 1963.

**8792 - 24GH and 26GH (rewired) - 24th and 26th July 1963.

9434 - 07LH - 7th November 1963.

**8792 - speakers rewired, the left-most one now installed in the cabinet at 90 degrees to the norm (the "VOX" logo running vertically).

Final assembly, testing, assigning of serial number - 1964 (in progress)

9917 - 03MH - 3rd December 1963.

10067 - Pulsonic cone code: 41H1777, December 1963 / January 1964 - see this page.

10237 - Pulsonic cone code: 42H1777, January 1964 - see this page.

10600 - 16MH - 16th December 1963.

10920 - 29AJ - 29th January 1964.

11247 - 03BJ and 04BJ - 3rd and 4th February 1964.

11564 - Pulsonic cone codes: 42H1777 and 51H1777, January 1964 - see this page.

11640 - 13BJ - 13th February 1964.

12010 - 03CJ - 3rd March 1964.

12028 - bought new in Manchester in May 1964.

12242 - 18BJ and 20BJ - 18th and 20th February 1964.

12740 - 10DJ - 10th April 1964.

12784 - 24CJ and 25CJ - 24th and 25th March 1964.

Super Twin 12907 - 25BJ - 25th February 1964.

13666 - Celestion T1088s, so May 1964 or later.

Super Twin 2838 - Celestion T1088s, so May 1964 or later.

Super Twin 2939 - Pulsonic cone code: 9H1777, May 1964 - see this page.

14334 - 12EJ - 12th May 1964.

Super Twin 2941 - 26EJ and 30EJ - 26th and 30th May 1964.

14832 - 01FJ - 1st June 1964.

15911 (?) - 22JJ - 22nd September 1964.

Final assembly, testing, assigning of serial number - 1965 (in progress)

17155 - 16MJ = 16th December 1964.

17180 - bought new in January 1965.

17505 - bought new in Liverpool late January / early Feb. 1965.

18128 - 02MJ = 2nd December 1964.

20447 - 17HK - 17th August 1965.

20648 - 21DK and 22DK - 21st and 2nd April 1965. The Woden mains transformer (original) has an August 1965 date code however.

20889 - after November 1965 (the print date of the owner's manual).

Super Twin 4831 - sold in January 1966.

Final assembly, testing, assigning of serial number - 1966 (in progress)

21202 - 18GL and 19GL - 18th and 19th July 1966.

Final assembly, testing, assigning of serial number - 1967 (in progress)

22789 - inspection tag dated 8th December 1967.

On to the page on Celestion blues.