Seiko Watchbands usually have the 18mm stamped on the underside of the strap.

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19 items found

Seiko Genuine Seiko Watchband 18mm Black Croco Grain $29.50	Seiko Gold Tone Buckle 18mm Black Croco Grain-4B63YB $32.50	Seiko Genuine Seiko Watchband 18mm Black Leather 4LH5YB $25.00
Seiko 18mm Black Lizard SGC036 Regular Length $25.00	Seiko Genuine Seiko Watchband 18mm Black Lizard-CN074 $68.00	Seiko Genuine Seiko Watchband 18mm Black Lizard-CN074 SHORT $68.00
Seiko Military Automatic 18mm Black Nylon $29.00 $25.00	Seiko Military Automatic 18mm Blue Nylon 4K12JZ $29.00 $25.00	Seiko Genuine Seiko Watchband 18mm Brown Croco Grain-4LB2YB $32.00
Seiko Genuine Seiko Watchband 18mm Brown Crocodile Grain-4F63YZ $22.00	Seiko Genuine Seiko Watchband 18mm Brown Genuine Lizard-MS9111 $65.00	Seiko Genuine Seiko Watchband 18mm Brown Leather-MS9239 $40.00
Seiko Gold Tone Buckle 18mm Brown Lizard Grain-Long $55.00	Seiko Genuine Seiko Watchband 18mm Brown Lizard-CN022 $68.00	Seiko Genuine Seiko Watchband 18mm Dark Brown Lizard Grain-SGG490 $44.50
Seiko Genuine Seiko Watchband 18mm Mahogany Brown Padded Calfskin $36.00	Seiko Military Automatic 18mm Olive Green Nylon 4K11JZ $25.00	Seiko Military Automatic 18mm Tan Nylon-4K10JZ $29.00
Seiko Genuine Seiko Watchband 20mm Black Croco Grain-4LH9YB $35.00