Roxxy BL Outrunner 1820/16, 1650 kV, 19g, Multiplex # 314942 | Robbe/Roxxy | Direct drive | Brushless motors/Drive sets | Electric motors, combos and gearboxes | All you need for electric flight
Vintage Mac Tools 5/8" Inch Single Box End Wrench Hand Tools Offset BL 1820 | eBay
File:Seven Mewatis, recruits for the regiment of Skinner's Horse - Anon, 1820-1830 - BL Add.Or.1262.jpg - Wikimedia Commons
Prothane Motion Control 19-1820-BL Prothane Ball Joint Dust Boots | Summit Racing
OEM LG BL-41ZH 1820 mAh / 1900 mAh 6.9 Wh / 7.2 Wh 3.8 v | eBay
Presumably 1820 hi-res stock photography and images - Alamy
File:Great news - Rowlandson's characteristic Sketches of the Lower Orders ( 1820) - BL.jpg - Wikipedia