Amp Archives A photographic archive of audio amplifiers. Dating a Marshall amplifier can be a daunting task for even the most savvy of suitors Amp Archives is here to help. The earliest Marshall amplifiers were made in 1. From 1. 96. 2 until 1. Marshall amplifiers were identified by a four digit sequential number inside the back panel, reportedly starting with 1. Examples 0. 00. 9 1. JTM 4. 5 Offset. 11. JTM 4. 5 Offset. 22. JTM 4. 5 Lead. More Examples 1. Beginning in 1. 96. Marshall abandoned the four digit numbering system and began using model numbers, sometimes called series numbers and model codes. While there are serial like numbers during this era, no standard serial number format has been identified. The model numbers can be somewhat confusing because model numbers such as 1. Amplifiers from this era must be dated within this time span based on their features, or component manufacturers and codes, including speakers, potentiometers and transformers. Back panels are cream colored. JTM 4. 5 block logos changed to gold plated plastic script, these are fragile and many have been replaced. Cabinet feet are small round and gray. Handles changed to plastic with larger end cap. Fender Frontline 2003 BOOK. Everybody has the magazinestyle soft cover Frontlines, but this was a limited run hardcover edition, fully bound and factory sealed in. Serial Number Criteria Description Criteria B17G Data last updated Tue Mar 15 092504 2016 4124440. 4124489 Boeing B17F10BO Fortress MSN 31253174 24440. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get. Power tubes are KT6. L6 and 5. 88. 1. RS Spares or Drake transformer, rated at 8. JTM 4. 5. Some JTM 1. JMT 4. 5 badge. 1. Power tubes are EL3. JTM 4. 5 logo changed to JTM 5. JTM 1. 00 indicating the amps wattage. Single 1. 00. W Drake transformer, rated at 4. W models. Single 5. Murderpedia, the free online encyclopedic dictionary of murderers. The largest database about serial killers, mass murderers and spree killers around the world. Model Limited Edition Wildwood Spec ES330 Finish Color Pelham Blue Finish Type Hi Gloss 90 Sheen Lacquer Finished in VOS Weight 6. 27 lbs Bracing. W Drake output transformers rated at 3,4. W models. GZ3. 4 rectifier no longer used. Cabinets have corner lock joints with a quality control signature inside. Reverse Black Flag JTM logo used for half the year, carrying over from late 1. Gold Plexigas back panel, changed from cream colored. Dagnall transformers used in the JTM 1. Drake. Chassis construction transitions from aluminum to steel in late 1. First 2. 00 Watt Majors appeared, with treble, bass and volume controls, active tone circuitry and KT8. White logo changed from goldThe lipshelve under the control panel is curved, changed from straight. Amp model prefix changed from JTM to JMP Jim Marshall Products. The 2. 00 watt Major was modified to match the normal panel layout and the active electronics where dropped. The output transformer turned 9. Plexiglas panels changed to brushed aluminum startiong in early 1. Larger black cabinet feet starting in July 1. Examples 1. 47. 9 1. JTM 4. 55. 20. 0 1. JTM 4. 5SL 1. 05. Model 1. 95. 9 JMP Super Lead. SP 2. 00. 99 1. 96. Model 1. 96. 8 JMP Super PASB 1. Model 1. 99. 2 JMP Super Bass. S 1. 06. 37 1. 96. JMPSA 2. 14. 8 A 1. JMPMore Examples The model number takes the form of four digits preceded or followed by letter codes describing amplifiers characteristics. The table below outlines the meaning of these letter codes. S or SA. 5. 0 Watt. A. 2. 00 Watt. SL. 1. 00 Watt Super Lead. SB. 1. 00 Watt Super Bass. T. 5. 0 Watt Tremolo. ST. 1. 00 Watt Tremolo. SP. Super PA. 1. Marshall amplifiers didnt start using true serial numbers until July of 1. The full identifier of these amps was initially comprised of a model code, the serial production number and the date code. Examples SA 4. 77. G 1. 97. 5 Model 1. JMP Lead. SA 4. 27. H 1. 97. 6 Model 1. JMP Lead. SA 0. 88. H 1. 97. 6 Model 2. JMP Master Volume. More Examples Letters were used as date codes to represent the year of production and this letter followed the serial production number. Letters B, I, O and Q were not used to avoid confusing letters with numbers. S or SA. 5. 0 Watt. A or A. 2. 00 Watt. SL or SLA. 1. Watt Super Lead. SB or SBA. 1. Watt Super Bass. T or TA. 5. 0 Watt Tremolo. ST or STA. 1. Watt Tremolo. SP. Super PA. RI. Reissue. Date Code. Year. A. 1. 96. C. 1. 97. 1. D. 1. E. 1. 97. 3. F. 1. G. 1. 97. 5. H. 1. J. 1. 97. 7. K. 1. L. 1. 97. 9. M. 1. N. 1. 98. 1. P. 1. R. 1. 98. 31. 98. Starting in 1. 98. Examples U 0. 81. Model 2. 20. 4S JCM 8. Master Volume Mini stack Version. SA V 1. 07. 79 1. Model 2. 20. 4 JCM 8. Master Volume. SA W 3. Model 2. 20. 3 JCM 8. Master Volume. S W 2. Model 1. 98. 7S Lead More Examples. Date Code. Year. S. 1. 98. 4. T. 1. U. 1. 98. 6. V. 1. W. 1. 98. 8. X. 1. Y. 1. 99. 0. Z. 1. In October of 1. 99. Marshall began using stickers printed with serial numbers and bar codes. These were comprised of nine digits in the format of xx xxxxx xx though not always. These serial numbers can be decoded as follows The first two numbers indicate the last two digits of the year of production. The middle five numbers indicate the production number. The last two numbers indicate the week of the year 0. Examples 9. 3 1. Model 9. 10. 0 Valve Amp for JMP 1. RI 9. 5 9. 40. 82 4. Model 2. 24. 5 JTM 4. Reissue. SA 9. 5 5. Model 2. 20. 3 JCM 8. Master Volume. RI 9. Model 1. 98. 7X Reissue. More Examples 1. 99. Present. In August of 1. Marshall switched to their current serial number format which contains more information and is easily decoded. Examples M 2. 00. Z 2. 00. 0 Model 1. AXM 2. 00. 0 2. Z 2. 00. 0 VBC8. 10 Bass. M 2. 00. 2 2. 1 0. B 2. 00. 2 Model 2. ZW JCM 8. 00, Zakk Wylde, 5. More Examples These are printed on a sticker and affixed to the back of the amplifier and are comprised of a letter followed by ten numbers followed by another letter A xxxx xx xxxx A. The first letter indicates what country the amp was manufactured in. Code. Country. MEngland. C China. I India. K Korea. The next four digits indicate the year of production. The next two digits indicate the week of the year during which the amp was produced 0. The next four digits indicate the production number. The final letter indicates the voltage specification. Code. Voltage. A2. VAC, UKB1. 206. 0 VAC, USC2. VAC, Canada. D1. 055. VAC, Japan. E2. 206. VAC, Europe. F1. 306. VAC, Mexico. ZSpeaker Cab. Its important to note that, especially in the early years, Marshall was not always consistent there are exceptions to these rules. Checking against other amps from the era as well as component markings speakers, potentiometers, transformers can help to confirm a year of production.