Well, that Zenith has forced a little rationalisation of the collection, and unfortunately another victim is my beloved MM300. However, to fill the tool watch void, what better solution than a Seiko “Tuna” SBBN007? With a heritage that goes back some four decades and a shrouded case that just screams “I mean business”, this is the perfect foil to the other three watches that sit proudly in the box.

The SBBN007 is big – the case measures 48mm in diameter, not including the crown, 14mm in thickness and has a 22mm lug width. That said, the lugs sit pretty much underneath the case, and as a consequence it wears surprisingly small on the wrist considering its dimensions. Internally, it’s powered by the respected 7-jewel Seiko 7C46 quartz movement. Overall, as you can see from the photos below, he look and feel is one of quality. This is, after all, a Prospex model and it enjoys a cult following amongst those who err towards dive watches in their collection.

So, here it is then – Seiko’s much-revered shrouded diver. Gotta love some Tuna, don’t you think?