Which is cheaper, the Hamilton Jazzmaster Open Heart Auto or the Helgray Speedster (Racing Light Blue)?

At MSRP the Helgray Speedster (Racing Light Blue) is the cheaper of the two at $299, against $2,695 for the Hamilton Jazzmaster Open Heart Auto — a $2,396 gap before any retailer discounting.

Which is bigger, the Hamilton Jazzmaster Open Heart Auto or the Helgray Speedster (Racing Light Blue)?

The Helgray Speedster (Racing Light Blue) wears larger at 39mm versus 36mm for the Hamilton Jazzmaster Open Heart Auto — a 3mm difference across the dial.

Which has better water resistance, the Hamilton Jazzmaster Open Heart Auto or the Helgray Speedster (Racing Light Blue)?

The Hamilton Jazzmaster Open Heart Auto is rated to 50m versus 30m for the Helgray Speedster (Racing Light Blue).

Which has a longer power reserve, the Hamilton Jazzmaster Open Heart Auto or the Helgray Speedster (Racing Light Blue)?

The Hamilton Jazzmaster Open Heart Auto carries a 80-hour power reserve against 40 hours on the Helgray Speedster (Racing Light Blue).

What movement does the Hamilton Jazzmaster Open Heart Auto run compared to the Helgray Speedster (Racing Light Blue)?

Both watches run automatic movements — the Hamilton Jazzmaster Open Heart Auto uses the H-10 and the Helgray Speedster (Racing Light Blue) uses the Miyota 6S21.

Side by side

Hamilton Jazzmaster Open Heart AutovsHelgray Speedster (Racing Light Blue)

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Hamilton Jazzmaster Open Heart Auto

h32205890

MSRP $2,695

Helgray Speedster (Racing Light Blue)

speedster-racing-light-blue

MSRP $299

At a glance

8 of 29 specs differ

Diameter

Jazzmaster Open Heart Auto36mm

Speedster (Racing Light Blue)39mm

Power Reserve

Jazzmaster Open Heart Auto80h

Speedster (Racing Light Blue)40h

Water Resistance

Jazzmaster Open Heart Auto50m

Speedster (Racing Light Blue)30m

MSRP

Jazzmaster Open Heart Auto$2,695

Speedster (Racing Light Blue)$299

Full specifications

Case

4 specs

Diameter

36mm

39mm

Thickness

10mm

12mm

Lug Width

18mm

20mm

Water Resistance

50m

30m

Crystal & Dial

1 specs

Dial Color

Mother of pearl

Black

Movement

2 specs

Caliber

H-10

Miyota 6S21

Power Reserve

80h

40h

Pricing

1 specs

MSRP

$2,695

$299

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