The short-lived Euphonicon (from Greek, "sweet-toned") was patented by John Stewart in 1841 and manufactured under his supervision. Hand-painted designs and gilded brackets soften the industrial aspect of the solid iron frame
At nearly 600 pages with information on more than 1,900 brands and 1,400 photos, The Official Vintage Guitar Price Guide is the industry-leading reference for values on vintage and collectible guitars, basses, lap steels, mandolins, ukuleles, banjos, amps, and effects. Published annually by Vintage Guitar magazine and selling more than 153,000 copies to date
Other tools I love that some may see as gadgets are a Benriner mandoline and an immersion blender. There are all kinds of plastic mandolins out there, almost all of them worthless in my opinion. The Benriner mandoline is the industry standard among cooks. This is the one I recommend. For 21 bucks, you can’t beat it.