ed ▁to ▁bare ▁wood ▁and ▁light ly ▁lac quer ed ▁with ▁two ▁thin ▁co ats ▁of ▁nit ro - cell ul ose . ▁In ▁the ▁early ▁sevent ies , ▁the ▁original ▁tun ers ▁were ▁replaced ▁with ▁a ▁set ▁of ▁gold ▁Gro ver ▁tun ers ▁or ▁machine ▁heads . ▁His ▁stri pped ▁guitar ▁( st ill ▁with ▁the ▁original ▁nick el ▁tun ers ) ▁is ▁first ▁seen ▁in ▁the ▁" Re volution " ▁prom o ▁film . ▁The ▁guitar ▁was ▁used ▁at ▁The ▁Rol ling ▁St ones ▁Rock ▁and ▁Roll ▁Circ us ▁in ▁December ▁ 1 9 6 8 , ▁the ▁Apple ▁ro o ft op ▁concert ▁on ▁January ▁ 3 0 , ▁ 1 9 6 9 , ▁and ▁the ▁concert ▁of ▁Live ▁Peace ▁in ▁Toronto ▁ 1 9 6 9 ▁with ▁the ▁Pl astic ▁O no ▁Band ▁on ▁September ▁ 1 3 , ▁ 1 9 6 9 . ▁It ▁can ▁also ▁be ▁seen ▁in ▁the ▁Let ▁It ▁Be ▁film , ▁ ▁and ▁most ▁other ▁pictures ▁of ▁L enn on ▁playing ▁guitar ▁after ▁that ▁time . ▁L enn on ▁also ▁played ▁with ▁a ▁" natural ▁finish " ▁E pi phone ▁cas ino ▁during ▁one ▁of ▁their ▁last ▁shows , ▁the ▁" The ▁Beat les ' ▁ro o ft op ▁concert ". ▁ ▁Harrison ▁had ▁his ▁fitted ▁with ▁a ▁Big s by ▁trem , ▁removed ▁the ▁pick guard ▁( it ▁can ▁be ▁seen ▁in ▁this ▁state ▁in ▁the ▁" Hello ▁Good bye " ▁and ▁" P en ny ▁Lane " ▁videos , ▁and