Waltham Watch Company Vanguard

American Waltham 'Vanguard' 10k gold filled pocket watch with 'up/down' power reserve indicator, circa 1918, serial no. 22040xxx, lever-set signed 23 jewel adjusted 6 positions movement with inner terminal hairspring + lossier, no. 22040xxx, signed Arabic numeral dial with minute markers, power reserve and subsidiary seconds dials, blued steel hands, within a 'Wadsworth' screw case, no. 8216xxx, 51mm, Movement - currently functioning, power reserve dial functioning. Dial - minor light marks. Glass - good. Hands - good. Case - light surface marks. Crown - adjusting correctly.