Beautiful rare vintage diver Citizen Parawater 100M automatic watch. 
Measures 44mm. It’s a jumbo case but very thin (see pictures).
Original Citizen automatic movement. Cal. 7270 made in Japan. Signed Citizen 21 Jewels.
Original jumbo stainless steel case and case back
Original crown signed CTZ.
Case back is signed Citizen with serial number and watch reference 67 5776.
Original and wonderful Citizen blu dial with very good green tritium on the index.
Original and signed Citizen Pat Pend stainless steel bracelet.

Watch run very well.
Be careful. It’s a vintage watch, so it is NOT good to immersion or shower.