- Mayonaise: released mid 2004
- Dual Loop: released late 2004
- Zero: released early 2005
- Screw Driver: released mid 2005
- Top Fuel: released mid 2005
- Ernie: released mid 2005
- Mayo: released late 2005
- ? Lady: released mid 2006
- Cognitive Dissonance: released mid 2006
- Pink Flesh: released mid 2007
- Lunar Module: released late 2007
- Echo: released mid 2008
- Screw Driver Deluxe: released late 2008
- Cognitive Dissonance MkII: released late 2008
- Pig Mine: released mid 2009
- Lunar Module Deluxe: released mid 2010
- Supa Tone: released mid 2010
- Mayonaise MkII: released late 2010
- Pink Flesh MkII: released late 2010
- Cognitive Dissonance MkIII: released mid 2011
- Paradigm Shift: released mid 2011
- Screw Driver Mini Deluxe: released late 2011
- Lunar Module Mini Deluxe: released late 2011
- P19: released early 2012
- Little Miss Sunshine: released early 2013
- BC109 Fuzz: released late 2012; revised model released late 2013
- Hybrid Fuzz Driver: released early 2013
- Giant Meat Pie: released early 2013
- Giant Meat Pie BC239: released late 2013
- Bloody Knuckle: released early 2014
- Mayonaise MkIII: released early 2014
- BC239 Fuzz: released mid 2014
The Skreddy Pedals from 2004-2006 all had etched boards, and bezels around the LED. In late 2006-early 2007, the Mayo shifted from an etched board to a green PCB. This board was also used for the Pink Flesh. The Screw Driver kept an etched board through to early 2008, and the same etched board was also used for the early Lunar Modules. By mid 2008 PCBs were standard in all pedals.
The LED bezel was phased out in late 2010, with the Mayonaise MkII having one, but the Pink Flesh MkII not having one. Save for the Pig Mine, where the bezel is part of the graphics in the miner’s helmet, all Skreddy Pedals lost the LED bezel by 2011, save for one-offs.
The 9v input changed around 2009, I believe, going from the kind with a short barrel that is nearly flush with the enclosure and screws on from the inside. By late 2009, the 9v jacks were the longer barrel style which screws on from the outside. Some earlier Skreddy Pedals may have had the longer barrel on them.
The Model/Date/Signature on the inside of pedals followed a format of: 2004-early 2007 hand written on the inside backplate, mid 2007 hand written across two white mailing labels, late 2007-Current printed on a single white mailing label.
Glad to help. Please note that everything I've input here is coming from personal experience with Skreddys I've owned, along with observations I've made when seeking info out. The final word on this stuff obviously would come from Marc. I think the last bit of info I can provide here is regarding the different types of finishes. The earliest Skreddy pedals (2004-2005) had either full-face graphic decals with a clear coat over them (think of the red circle Mayonaise design, or the celtic cross Screw Driver), or were solid color boxes (plain steel, stained color steel, or solid painted color box) with individually placed water-slide decals for the name of the pedal, the control knobs, the Skreddy Pedals logo, etc. Full-face decals are still found on Skreddys like the Cognitive Dissonance MkIII, the full color Zero, and the full color Top Fuel, and are still used for custom art, whereas the water-slide decals disappeared in mid 2006, in favor of silk screened graphics. All Skreddy Pedals have a clear coat on top, but there was a period in 2007-2008 when some boxes didn't get the last coat over the graphics. These pedals are easy to spot without even seeing the serial number or date, due to the fact that many of these pedals have scratched up logos and graphics. There are a few Screw Drivers from this period like this, as well as some of the original Pink Flesh pedals. There was a time when certain boxes were sent outside for painting, if memory serves. I think this mostly applies to the Pig Mine, and the 3 knob red Screw Driver and 3 knob black Lunar Module, just before those were discontinued. You can tell that the painting on these is different because the backplate and inside of the enclosure is also painted and powder coated, whereas pretty much all other Skreddys have no paint on the inside, save for residual spray. As for unique graphics done by others, the two custom painters that come to mind are Swankbox (aka Gashpaint), and Donner (of Bearfoot FX). Each has a unique style. Swankbox/Gashpaint pedals are the ones with multi-colored "swirlies", including some swirled pedals which have no labels or logos on the pedals at all. The General Pig series of P19 pedals were also done by Swankbox/Gashpaint. The Donner boxes out there include the "Smashed Pumpkin" Mayo, the purple/silver/gold/glitter ? Lady, the white/pink/purple swirled "Pinkmour" Top Fuel, and a Screw Driver that has a wide orange/rust colored stripe running horizontally across the face of the pedal.