APM Telescopes. TS 1.25" Plössl Eyepiece with 6.3 mm focal length, 50° apparent field of view
1.25inch Telescope 6.3mm Plossl Eyepiece Full Coated for Telescope Black+Sliver | eBay
PL6,3 Eyepiece | DÖRR
High Power Hd Plossl Eyepiece Telescope Accessory Kit Multilayer Coating Glass Lens 3.6mm 6.3mm 32mm With 3x Barlow Lens Metal - Telescope - AliExpress