Captain's telescope clip art, object illustration. Free public domain CC0 image. https://www.rawpixel.com/image/6328923/image-sticker-public-domain-illustrationsFree Image from public domain licenseTheodolite instrument vintage illustration. Free public domain CC0 image. https://www.rawpixel.com/image/6684926/image-vintage-public-domain-illustrationsFree Image from public domain license