The Ultimate Guide to Seiko 6138 Bracelet & Straps References
written by Mads – February 28, 2025
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Seiko 6138 Bracelet Part Numbers
This guide documents original bracelet references associated with the Seiko 6138 chronograph series. The information is based on period catalogs, documented collector examples and long-standing research within the vintage Seiko community.
As one of Seiko’s most iconic automatic chronograph platforms, correct bracelet identification plays an important role in preserving originality and historical accuracy across the 6138 range.
Seiko 6138-0010
Watch reference:
6138-0010
Referred to as:
UFO / Yachtman
Dial:
Black Dial
Bracelet reference:
XAA 240, 19mm
Seiko 6138-0011
Watch reference:
6138-0011
Referred to as:
UFO / Yachtman
Dial:
Black Dial
Bracelet reference:
XAA 541, 19mm
Seiko 6138-0020
Watch reference:
6138-0020
Referred to as:
Tokei Zara
Dial:
Black Dial, Blue Sub-Dial
Bracelet reference:
XAA 501, 20mm
Seiko 6138-0020
Watch reference:
6138-0020
Referred to as:
Tokei Zara
Dial:
Grey Dial, Grey Sub-Dial
Bracelet reference:
XAA 501, 20mm
Seiko 6138-0030
Watch reference:
6138-0030
Referred to as:
Kakume
Dial:
Champagne Dial
Bracelet reference:
XGA 261, 19mm
Seiko 6138-0030
Watch reference:
6138-0030
Referred to as:
Kakume
Dial:
Blue Dial
Bracelet reference:
XGA 261, 19mm
Seiko 6138-0040
Watch reference:
6138-0040
Referred to as:
Bullhead
Dial:
Brownish Dial
Bracelet reference:
XGA 360, 20mm
Seiko 6138-8000
Watch reference:
6138-8000
Referred to as:
Baby Panda
Dial:
White Dial
Bracelet reference:
XAB 321, 19mm
Seiko 6138-8000
Watch reference:
6138-8000
Referred to as:
Baby Panda Reverse
Dial:
Black Dial
Bracelet reference:
XAB 321, 19mm
Seiko 6138-8010
Watch reference:
6138-8010
Referred to as:
Blue Panda, Holy Grail
Dial:
Blue Dial
Bracelet reference:
XJA 231, 19mm
Final thought
Bracelet and strap choices ultimately remain a matter of personal preference. While some collectors pursue the exact original configuration to preserve factory authenticity, others choose leather straps, nylon or modern alternatives that better reflect how the watch is worn today.
