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Model Name:

Islander ISL-21 GMT

Reference:

ISL-21 GMT

Current Rating

911

Rating Implied Value ($)

$

399

Expected Rating Based on Price

911

Price ($)

$

399

Rating Alpha

Date Added:

Jan 2, 2026

https://www.longislandwatch.com/Islander_ISL-21_GMT_p/isl-21.htm

# Times Rated

Watch Description

40mm GMT tool watch with ceramic bezel, sapphire crystal, 200m WR, and NH34 movement.

12.3

200

316L Stainless Steel

Round

Sapphire Domed AR

Screw-Down

Automatic

Seiko NH34A

Black Sunburst

TheWatchMetrics

Follow for Updates:

Model Name:

Reference:

Current Rating

Rating Implied Value ($)

$

Expected Rating Based on Price

Price ($)

$

Rating Alpha

Date Added:

https://www.longislandwatch.com/Islander_ISL-21_GMT_p/isl-21.htm

# Times Rated

Watch Description

Model Name:

Reference:

Current Rating

Rating Implied Value ($)

$

Expected Rating Based on Price

Price ($)

$

Rating Alpha

Date Added:

https://www.longislandwatch.com/Islander_ISL-21_GMT_p/isl-21.htm

# Times Rated

​

Watch Description