Seiko & Citizen Watch Forum Message Archive

First of all, thank you everyone for taking an interest in the Professional 200m quartz diver I posted yesterday.

Many of you asked about the differences between the ordinary quartz divers and the Professional model. I don't own any other vintage or modern quartz divers, so I can't really make a good comparison, but I've taken some close-up pics comparing the 7C43 quartz diver with a 6309-7290 and an SKX007. Here are the additional close-up pics showing a little bit of the professional diver's reinforced case design.

On the left, the 7C43-7009 Pro. 200m quartz diver (1988 production)

On the right, a 6309-7290 auto diver (1982 production) with pretty much the same case design

Note the screw-down crystal retaining ring on the 7C43 diver

Left: 7C43 quartz diver, right: 6309-7290 auto diver

The case designs are almost identical (as are the crowns)

Here's a close-up of the 7C43 diver's retaining ring and crown

(The unsightly green goop on the ring is some waterproof ball-bearing grease I used to lubricate the bezel)

The crown viewed from above

The crown viewed from below

For comparison, here's the crown on an SKX007K diver

A little group shot of the models

(Back: 6309-7290, right: SKX007K, front: 7C43-7009 Pro. 200m diver)

Thanks for reading and have fun with your Seikos!

-Kevin