As the FX15 was a slow seller, it is reasonable to assume that many circuit boards were assembled but not immediately housed in an enclosure, which would explain why the component date was about two years younger than its serial number.
Between serial number 200k (1983) and 1600k (1996), the correlation is sequential but nonlinear as production increased or slowed down.Even including a couple of outliers, the correlation between serial number and component date is remarkable (r = 0.995 for a 4th-order polynomial curve fit).The main limitation to such an approach is that the date of assembly of the complete pedal would necessarily lag the newest component date code, perhaps by 2-8 weeks.Because the exact lag time is unknown, we decided not to include a "fudge factor" in our plot below: One caveat when using this plot is that when DOD rolled over from serial number 999999 to 1000000, the leading "1" was included in smaller text in the line above the rest of the serial number.Some early DOD FX-series pedals have stickers with the date of final assembly, but unlike Boss pedals, the month and year of manufacture is not encoded in its serial number.
However, like vintage guitars and amps, the date of manufacture of almost any effects pedal can be estimated by examining the date codes of its components.However, the bifurcation of the scatter plot might be explained if pedals are sorted by series and then by the type of serial number sticker used.The x-axis of the plot was modified to include the year 2000, and the date code of three final-series pedals (a FX25B, FX84, and FX91) that had been previously assumed to have a date code of late 1999, were revised in April 2011.I realized that the usual Boss-style serial number at the bottom of the back label is not there and there is a transparent sticker instead on the metal body below the thumbscrew with some very weird numberings ie. People searched for this, also searched for these: how to boss ds settings how to verify guitar by serial number what is the pedal board rigs what distortion pedal can take guitars string 10-60 is there a difference between the boss ds-1 bass mod and the boss ds1 keely ultra mod?I was cruising around Analogman's site and I saw a link I hadn't noticed before - it takes you to a Boss serial number decoder site - type in your pedal's serial number, and out pops the month and year it was made. my MIJ silver screw CE-2 was made in June of 1980. ********** "Look at it this way: think of how stupid the average person is, and then realize half of 'em are stupider than that." - George Carlin "It shouldn't be expected that people are necessarily doing what they appear to be doing on records." - Sir George Martin, All You Need Is Ears "The music business will be revitalized by musicians, not the labels or Live Nation.Although we only have data from four PDS-series pedals, it may be reasonable to use this plot to estimate the production date of all PDS-series pedals.