Which is better for everyday wear?

The SRPD79K1. It is thinner, lighter and comes on a nylon NATO that breathes and dries fast. The SRPD76K1 is fine daily too, but its silicone band and thicker case feel more sport than office.

Do they use the same movement?

Yes. Both run the Seiko 4R36 automatic with manual winding, 24 jewels and about 41 hours of power reserve, plus day and date at 3 o'clock. Performance and servicing are the same.

Wear depends on the coating and strap, not the movement. The SRPD79K1's black hard coating can scratch to reveal steel underneath, while the SRPD76K1's rose-gold-tone finish wears similarly. Nylon straps are cheap and easy to replace; silicone lasts well but can attract lint.

Is the SRPD79K1 worth stepping up to over the SRPD76K1?

If you want a slimmer, lighter watch with a display back and a stronger owner record, yes. If the rose-gold-tone look is what draws you, the SRPD76K1 delivers it on the same reliable movement.

Can I swap the straps between them?

Yes. Both use 22 mm lugs, so most 22 mm straps fit either watch. That makes the band choice a matter of taste rather than a limit.

Which is more legible?

The SRPD76K1's lighter rose-gold-tone case frames the black dial with more contrast. The all-black SRPD79K1 looks sharper but reads less clearly in dim light.

Seiko 5 Sports SRPD76K1 vs Seiko 5 Sports SRPD79K1

Both are Seiko 5 Sports automatics on the same 4R36 movement, so the real choice is finish and feel. The SRPD79K1 is the safer buy: a slimmer 12.2 mm case, a lighter 94 g body, a nylon NATO strap and a see-through case back, and it carries a much stronger owner rating. The SRPD76K1 is the dressier option with its rose-gold-tone case, but it is thicker at 13.4 mm and its silicone band suits sport more than office wear.

Choose the Seiko 5 SRPD76K1 if you want a warmer rose-gold-tone case and a silicone band for sport and casual wear.
Choose the Seiko 5 SRPD79K1 if you want the slimmer, lighter all-black watch with a NATO strap and a display case back.

Prices

Seiko 5 Sports SRPD76K1: $97.00 at My Store (last seen Nov 10)
Seiko 5 Sports SRPD79K1: $108.00 at jaek (last seen Nov 13)
Difference: the Seiko 5 Sports SRPD76K1 is $11.00 cheaper than the Seiko 5 Sports SRPD79K1 at the latest prices (Nov 10 and Nov 13)

Seiko 5 Mechanical Classic Watch Black SRPD76K1

What separates them

	Seiko 5 Sports SRPD76K1	Seiko 5 Sports SRPD79K1
Case finish	Stainless steel with rose-gold-tone coating	Stainless steel with black hard coating
Case thickness	13.4 mm	12.2 mm
Weight	100 g	94 g
Strap	Silicone, 22 mm lugs	Black nylon NATO, 22 mm lugs
Case back	Solid	See-through, shows the 4R36
Movement	4R36 automatic, 41-hour reserve, day-date	4R36 automatic, 41-hour reserve, day-date
Crystal and water resistance	Hardlex, 10 bar	Hardlex, 10 bar
Owner rating	4.1 from 16 ratings	4.9 from 173 ratings

Specs compared

Spec	Seiko 5 Sports SRPD76K1	Seiko 5 Sports SRPD79K1
Movement type	Automatic with manual winding capacity	Automatic with manual winding
Power reserve	Approx. 41 hours	Approx. 41 hours
Case diameter	42.5 mm	42 mm
Case thickness	13.4 mm	12.2 mm
Water resistance	10 bar	10 bar
Band material	Silicone	Nylon
Weight	100.0g	94 g
Lug width	22.0mm	22mm
Calibre	4R36	—
Case length	46 mm	—
Glass type	Hardlex	—
Dial colour	Black	—

Show all 18 specs

Spec	Seiko 5 Sports SRPD76K1	Seiko 5 Sports SRPD79K1
color	Black	—
size	One Size	—
Caliber number	—	4R36
Jewels	—	24
Lug-to-lug	—	47.4 mm
Crystal	—	Hardlex

Seiko 5 Sports SRPD76K1 vs Seiko 5 Sports SRPD79K1

Prices

Seiko 5 Sports SRPD76K1 vs Seiko 5 Sports SRPD79K1

Prices

Seiko 5 Sports SRPD79K1

What separates them

Price history

Prices at every store