Hi guys, I just found this old Seiko A156, unfortunately the battery is missing and it only "works" when it's under a source of light. Does anyone of you know what battery
SEIKO - A156-5020 - Solar - Vintage Digital Watch - Digital-Watch.com
SEIKO - A156 5040 - Digital - Vintage Digital Watch - Digital-Watch.com
Hour:Second:Time - 1979 Seiko A156 5020 in Gold. Seiko's first solar cell watch and a very collectable model, hard to find working, let alone in this condition. £80 | Facebook
Seiko A156-5030 Solar Silver Wave Chrono Alarm Digital Watch / For Parts/Repair | eBay