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60s Seiko 6602-9982

https://i.imgur.com/VodKIoS.jpg

Grand Seiko 5722-9970

https://i.imgur.com/WNhEkFl.jpg

'65 Seiko 6218-8971

https://i.imgur.com/3DBnTdg.jpg

Seiko 6218-8971

https://i.imgur.com/cLV2UfH.jpg

Citizen Autodater from the 60s...

https://i.imgur.com/wTo7ruP.jpg

Seiko SBDX001

https://i.imgur.com/g9boQKV.jpg

Seiko 7C46-6009

https://i.imgur.com/dwPvsQQ.jpg

Ricoh 700m

https://i.imgur.com/xXwr610.jpg

PADI Tuna

https://i.imgur.com/bDIbslJ.jpg

Seiko SBDC055

https://i.imgur.com/32g03jb.jpg

https://i.imgur.com/TdzzYWz.jpg

'96 CWC RN Diver

https://i.imgur.com/qKouQJd.jpg

50mm or 50.5mm. The current 1000m auto Tuna lineup is 52mm in diameter.

Lovely watch and IMHO so iconic. I've got four and none of them looks the same. Love that.

Seiko SBDX001

https://i.imgur.com/3XlPsAe.jpg

'78 Seiko 7548-700H

https://i.imgur.com/5YDFy4I.jpg

Seiko 6309-7049

https://i.imgur.com/TOab4Yy.jpg

Seiko 7C43-700B

https://i.imgur.com/Q1EpAhC.jpg

Great write-up. The 300m SBBN007 was my very first Tuna and still is one of my favorite. Then there are the auto Tunas...

https://i.imgur.com/mVpMRub.jpg

https://i.imgur.com/kKc1kvI.jpg

HAGWE!

'96 CWC RN Diver

https://i.imgur.com/MmiLQky.jpg

Seiko 7C43-7000

https://i.imgur.com/hykg1rY.jpg

Seiko SBDX011

https://i.imgur.com/Z2GbziR.jpg

https://i.imgur.com/zhfzs1d.jpg

https://i.imgur.com/ge4hcaV.jpg