Seiko] 6139-7070 "Baby Jumbo" The blue dial is just awesome. I never see these, only the black versions. (x-post /r/JapaneseWatches) : r/Watches
Seiko 6139-7070, one of the petrol watches, on a vintage white Tropic Star strap #seiko #seiko6139 #61397079 #vintagechronograph #vintag... | Instagram
Servicing a Seiko 6139-7070 vintage chronograph - Discussion of vertic – ClockSavant