Not the first Diver by Citizen, but the first model to hit international markets in 1969. These watches where made to be used and their mid ranged pricing made it a popular choice with professional and hobby divers alike, gaining the popular nick name: “Challenge diver” This watch is a original survivor from October 1969 and in good condition.
Case ref: 4-540115 Y made in October 1969. Case in good condition with original bezel. Crown has plate loss and is a non screw down variant. Movement is a calibre 5470 in-house Citizen calibre. Has been fully service in January 2022 and running well. You can see service photos here. Glass crystal has been replaced with a sapphire crystal.