| Year | 1940s | Color | Glossy Brown Mahogany | | | | | |
| Birthplace | Chicago, Illinois | Factory Options | N/A | | | | | |
| Manufacturer | The Harmony Company | Case Mfd. | N/A | | | | | |
| Model | TG1215 | Case Exterior | N/A | | | | | |
| Serial # | N/A | Case Interior | N/A | | | | | |
| Serial # Location | N/A | Case Extras | N/A | | | | | |
| Original Price | $23.00 | | | | | | | |
| Specifications | | | | | | | | |
| Overall | | | | | | | | |
| Type | Tenor Archtop, Auditorium Size | Body Length | 19 1/4″ | | | | | |
| Weight | 3.52 lbs | Body Depth | 3 3/8″ | | | | | |
| Scale | 22 1/2″ | Upper Bout Width | 11 1/4″ | | | | | |
| # Of Strings | 4 | Waist Bout Width | 9 1/2″ | | | | | |
| Total Length | 36 3/4″ | Lower Bout Width | 15 1/2″ | | | | | |
| Construction | | | | | | | | |
| Body | | | | | | | | |
| Body Type | Arched Top & Back, F-holes | Body Binding | Faux, White Laquer Edge Stripe | | | | | |
| Top | Birch | f-hole Binding | N/A | | | | | |
| Back | Birch | Bracing | Parallel Tone Bars Under Top | | | | | |
| Sides | Birch | Finish | Nitrocellulose | | | | | |
| Neck | | | | | | | | |
| Neck Detail | Maple | Side Marker | N/A | | | | | |
| Neck Profile | Hard V | Nut | Bone | | | | | |
| Neck Depth | .800″ 1st Fret, 1.160″ 2nd Fret | Nut Width | 1 1/4″ | | | | | |
| Neck Attachment | Set w/ Screw Support | 12th Fret Width | 1 1/2″ | | | | | |
| Neck Heel Cap | N/A | Truss | N/A | | | | | |
| Fingerboard | Ebonized Maple | Truss Adjustment | N/A | | | | | |
| Fingerboard Radius | 20″ | Truss Adj. Cover | N/A | | | | | |
| Fingerboard Binding | N/A | Peghead Profile | Harmony Small Paddle | | | | | |
| Frets | .056″ Brass | Peghead Veneer | N/A | | | | | |
| Fret Count | 20 | Peghead Binding | N/A | | | | | |
| Position Marker | Notched Diamond Stencil, 3,5,7,9,12 (db), 15 | Peghead Logo | Harmony Script Logo, White Screenprint | | | | | |
| Hardware | | | | | | | | |
| Tuners | Waverly “Yoda Head”, 1/4″ Shaft | Pickguard | Celluloid, Dark Tortoise | | | | | |
| Tuners Type | Individual, Open-back, 2-screws to Headstock | Pickguard Mount | Top Body w/ Mid-Bout Bracket | | | | | |
| Machine Heads | White Plastic Oval | Knobs | N/A | | | | | |
| Tuner Bushings | CM, Round | Knob Details | N/A | | | | | |
| Tailpiece | Trapezoid, Nickle Plated, Unhinged | Switch Cap | N/A | | | | | |
| Tailpiece Mount | Bottom Side, 4-Screws | Control Plate | N/A | | | | | |
| Bridge Type | 2-piece Floating, 2 Thumbwheel Height Adj | Pickup Bezel | N/A | | | | | |
| Bridge Detail | Archtop Style | Pickup Location | N/A | | | | | |
| Bridge Material | Rosewood | Pickup Mount | N/A | | | | | |
| Bridge Saddle | N/A | Strap Button | Wooden Endpin | | | | | |
| Tremolo Arm | N/A | | | | | | | |
| Catalog Description | | | | | | | | |
| “HARMONY” auditorium size, arched top and back, birch, F-holes, glossy brown mahogany finish, edges striped with white lacquer, | | | | | | | | |
| ovalled maple finger-board, celluloid guard-plate, adjustable bridge, an excellent value. | | | | | | | | |
| No. TG1215, Tenor Guitar 23.00 | | | | | | | | |
| | | | | | | | |
| 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 | | | | | | | | |