| Year | 1965 circa | Color | Black Multi-color Sparkle Accents. | | | | | |
| Birthplace | Suwa, Japan | Factory Options | Unknown | | | | | |
| Manufacturer | Zen On Guitar Co. Ltd. | Case Mfd. | Unknown | | | | | |
| Model | ZES-220 | Case Exterior | Grey with Cream Swirls Chipboard, Leatherette Trim w/ White Stitching. 3 latches, 2 metal hinges, 1 leather hinge | | | | | |
| Serial # | N/A | Case Interior | Red Felt w Neck Pocket | | | | | |
| Serial # Location | N/A | Case Extras | Neck Strap | | | | | |
| Original Price | Unknown | | | | | | | |
| Specifications | | | | | | | | |
| Overall | | | | | | | | |
| Type | Electric Solidbody Guitar | Body Length | 15 1/4″ | | | | | |
| Weight | 6 lb. 14 oz. | Body Depth | 1 3/8″ | | | | | |
| Scale | 25″ | Upper Bout Width | 9 5/8″ | | | | | |
| # Of Strings | 6 | Waist Bout Width | 9 3/4″ | | | | | |
| Total Length | 38 5/8″ | Lower Bout Width | 12 1/8″ | | | | | |
| Construction | | | | | | | | |
| Body | | | | | | | | |
| Body Type | Double Offset Cutaway, Contoured Body w/ Rounded Edges. | Body Binding | N/A | | | | | |
| Top | Laminate | f-hole Binding | N/A | | | | | |
| Back | Laminate | Bracing | N/A | | | | | |
| Sides | Laminate | Finish | Nitrocellulose | | | | | |
| Neck | | | | | | | | |
| Neck Detail | Wood Unknown, 1-piece Neck, 2-piece Peghead | Side Marker | White Dot 3,5,7,9,12,15,17. (12 has worn off) | | | | | |
| Neck Profile | C | Nut | White Plastic | | | | | |
| Neck Depth | 1st Fret .815″, 10th Fret .928″ | Nut Width | 1 5/8″ | | | | | |
| Neck Attachment | NPM Bracket w/ 4-bolt to Body and 2-screws to Neck, “Japan” Stamp in Metal. | 12th Fret Width | 2″ | | | | | |
| Neck Heel Cap | N/A | Truss | Steel Rod, Adjustable | | | | | |
| Fingerboard | Rosewood | Truss Adjustment | Neck Pocket, Torque Nut | | | | | |
| Fingerboard Radius | 9.5″ | Truss Adj. Cover | N/A | | | | | |
| Fingerboard Binding | N/A | Peghead Profile | Zenon Styling, 6-in-line, Angled | | | | | |
| Frets | .081″ Nickle Silver Wire | Peghead Veneer | N/A | | | | | |
| Fret Count | 20 | Peghead Binding | N/A | | | | | |
| Position Marker | 7 Pearlette Dot Inlay. 3,5,7,9,12(db),15,17 | Peghead Logo | Chrome Zenon Logo Glued to Peghead Front | | | | | |
| Hardware | | | | | | | | |
| Tuners | 6-in-line, COB | Pickguard | Gold Spackled Plate w/ Three Affixed Reflectant Control Plates | | | | | |
| Tuners Type | Individual, Open-back, 2-screws to Peghead, Split Shaft w/ Hole Tuning Posts | Pickguard Mount | 12-screws to Top | | | | | |
| Machine Heads | COB, Oval | Knobs | V/T, Knurled Platinum Hat with Black Indicator Dot | | | | | |
| Tuner Bushings | COB Round | Knob Details | Volume and Tone Control | | | | | |
| Tailpiece | COB Jazzmaster Type Tremolo, Spring Loaded Tension Screw, 5-screws to Top | Switch Cap | 5 White Plastic Button Upper-bout, 1 Black Plastic Slider Cap Lower-bout | | | | | |
| Tailpiece Mount | 3 Screws to Bottom Side | Control Plate | Three Separate Plates Affixed To Pickguard, UB: “Zen on” w/ Pickup Indicators, | | | | | |
| Bridge Type | Tune-o-Matic Type w/ Damper, Thumbscrew Height Adj.on Body Routed Posts | Pickup Bezel | LB: “ON OFF”, Knob Plate: “Volume, Tone” w/ 0-10 Position Markers, All Black Screenprint. | | | | | |
| Bridge Detail | Roller Tops, Rubber Dampening Mechanism with Lever. NPM | Pickup Location | N/A | | | | | |
| Bridge Material | N/A | Pickup Mount | Neck, Middle and Bridge | | | | | |
| Bridge Saddle | N/A | Strap Button | 2-screws through Foam-like Base to Plywood which is Affixed 4-screws to Body | | | | | |
| Tremolo Arm | Push-in, Black Plastic Cap | | Metal Bottom End Pin and Upper Bout End Pin | | | | | |
| Electronics | | | | | | | | |
| Pickup | 3 Single Coil | Switch Detail | UB: Spring Loaded Push Button Multi-purpose for Pickups and Tone, LB: DPDT Pickup Kill Switch | | | | | |
| Pickup Detail | White Plastic Cover | Switch Detail | UB: “MIC.1, MIC.2, MIC.3, ALL, CEAR-PUSH-SOFT”, LB: “ON OFF” All Black Screenprint | | | | | |
| Pickup Date | N/A | Switch Detail | “Soft” Button Changes Overall Pickup Tone by Engagng .02µF cap | | | | | |
| Pickup Poles | 6 Individual Slot-top Moveable Metal Posts | Capacitor Stamp | Thomil 47 koF 10 125V and 4.7k 20% 125 | | | | | |
| Pickup Wiring | Routed Body Cavity | Cap Value | .02(M)50 When “SOFT” Button is Engaged, 02 on Tone Pot | | | | | |
| Pickup Output | P1-3.29kΩ, P2-2.54kΩ, P3-2.37kΩ | Cap Value | .02µF for Both | | | | | |
| Potentiometers | Mfd. Unknown | Cap Value Actual | Switch: .017µF, Tone: .026µF | | | | | |
| Potentiometer Stamp | V-B250k, T-B250k (originals), Volume Pot Replacement CTS 013446 250k A 0733 | Wire Harness | Unshielded | | | | | |
| Potentiometer Value | 250kΩ | Ground Wire | N/A | | | | | |
| Pot Value Actual | V-252kΩ, T-245kΩ | Output Jack | Mfd. Unknown, Mounted to Pickguard | | | | | |
| | | | | | | | |
| Chronologue Legend | | | | | | | | |
| Pickups numbering starts from top position. Ex. P1-Neck, P2-Middle, P3-Bridge | | | | | | | | |
| Pup – Pickup | | | | | | | | |
| UB – Upper-bout, LB – Lower-bout, WB – Waist-bout | | | | | | | | |
| Laminate – Pressed layers of wood w/ veneer | | | | | | | | |
| Celluloid – Nitrocellulose-based plastics | | | | | | | | |
| W/B – Binding alternates White/Black or Black/White depending on count. Ex. 5-ply W/B = W/B/W/B/W | | | | | | | | |
| (db) – Double Markers | | | | | | | | |
| Pearlette – Plastic resembling natural pearl. | | | | | | | | |
| MOP – Authentic mother of pearl | | | | | | | | |
| COB – Chrome over brass | | | | | | | | |
| CM – Chromed Metal | | | | | | | | |
| OAP – Tuners mounted on a metal plate | | | | | | | | |
| V/T – Volume/Tone | | | | | | | | |
| kΩ – Kiloohms, measuring electric resistance | | | | | | | | |
| μF – Microfared, measuring electrical capacitance | | | | | | | | |
| Unknown – Electronics – examination would disrupt vintage integrity, or accurate reading is weighted by other components. | | | | | | | | |
| Unknown – Wood or hardware – examination would disrupt vintage integrity | | | | | | | | |
| N/A – Not Available from manufacturer. | | | | | | | | |
| The Chronologue entry is for model inspected only. Similar models may exhibit different specifications. | | | | | | | | |
| The Chronologue is for historic reference. Updates to continue. | | | | | | | | |
| Maintenance on models not performed unless documented. | | | | | | | | |
| The Chronologue is a registered trademark of SLT Vintage | | | | | | | | |