Seiko “Diastar” SSA285K1 and SSA287K1

Edit : 24.6.2016 (add more photos)

Got a call from my favourite watch store {Twinkle Electronic} on the newly arrival, Seiko “Diastar”. There is 4 models available. I decided to select only the 2 model with Nato strap, the code is SSA285K1 (Green nato) and SSA287K1 (Red nato). The other 2 model is in PVD gold case (gold PVD bracelet)  and black PVD case (black/yellow nato), not my type. It got its name Seiko “Diastar” as the case shape is vintage like and homage to the Rado Diastar ; but Bigger…… MUCH BIGGER ~! I happened to have a Rado Diastar in my collection and will snap some photos together.

Photo 18-5-16, 4 16 39 PM Photo 18-5-16, 4 16 14 PM Photo 18-5-16, 4 16 02 PM Photo 18-5-16, 4 16 58 PM 2181972gross

The Seiko “Diastar” has a 4R37 movement. Unlike the 4R35 and 4R36, the 4R37 has a 24hr indicator at 10.30pm location. I could not get any specification from the internet Below some measured specification :

Lug size : 22mm
Width : 44mm
Lug to lug : 47.5mm
Thickness : 13.5mm
Crystal : Hardlex
Movement : Automatic 4R37 with 24 hrs indicator
Case back : see thru

Lug is drilled thru for easy springbar removal. The springbar is single step with no flange and has a body thickness of dia 1.48mm.

Photo 18-5-16, 4 04 04 PM Photo 18-5-16, 4 04 27 PM

I’ll update this post as more specification comes along. Lets get to the photos.

Photo 18-5-16, 4 01 21 PM Photo 18-5-16, 4 04 04 PM Photo 18-5-16, 4 02 58 PM Photo 18-5-16, 4 01 41 PM

Photo 18-5-16, 4 01 33 PM

The Seiko Nato strap is quite stiff and thick. The thickness is measured at 2mm. Buckle is Seiko signed. Like any nato, it can flay quite easily. My green nato has a bit of flay at the end but it can be taken care of easily with some burning.

Photo 18-5-16, 4 06 01 PM Photo 18-5-16, 4 05 58 PM Photo 18-5-16, 4 09 10 PM

Here is some wrist shots :

Photo 18-5-16, 4 11 07 PM Photo 18-5-16, 4 11 02 PM Photo 18-5-16, 4 07 25 PM Photo 18-5-16, 4 07 28 PM

Lume shot :

Photo 18-5-16, 4 13 50 PM


Other Seiko “Diastar” model : (pic from the net)

SSA287 SSA289 SSA281 SSA283 SSA284 SSA285


Twinkle Electronic
1 Park Road
#02-33 People’s Park Complex
Singapore 059108

Operating hours
Mon- Sun: 11:30am- 9pm
Mon-Sun: 11.30am-9pm

Hope you guys enjoy the review.

 

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