Technical Archive

SevenFriday
P-Series P3B/01— lug 28mm

SevenFriday P-Series P3B/01: 28mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Artisanal Note

"This model requires a precise 28mm lug width to preserve the original sartorial balance."

Lug Width

28 mm

The essential strap measurement.

Browse 28mm straps →

Reference

P3B/01

Movement

Miyota caliber 82S7 Additional 24 Hour Hand (fixed), Small Seconds, Hours, Minutes

The Heritage

The SevenFriday P3B/01 belongs to the P-Series of the brand and features the Miyota 82S7 caliber. The watch presents indication of hours, minutes, small seconds and a fixed 24-hour hand. The lugs measure 28mm in width.

FAQ

What is the lug width of the SevenFriday P-Series P3B/01?

The lug width of the P3B/01 is 28 millimetres. This specific dimension determines the maximum strap width that can be attached. It is measured as the internal distance between the two vertical lugs where the strap connects to the case. A 28mm strap will fit perfectly without lateral play.

What is the best strap choice for the SevenFriday P3B/01?

For the P3B/01, we recommend straps in vegetable-tanned calf or alligator leather, which create elegant contrast with the polyurethane case. A black paracord NATO strap respects the functional, industrial spirit of the design. Black FKM rubber is ideal for daily sporting use, offering comfort and wear resistance. Your choice depends on intended use: formal (alligator), versatile (calf), sporty (NATO or rubber).

How do I change the strap on the SevenFriday P3B/01?

The P3B/01 features fixed lugs, so strap replacement requires a spring bar removal tool to extract the elastic bars from the lug holes. Position the tool in one of the side holes, push inward to decompress the spring, and extract the bar. Repeat on the opposite side. To fit a new strap, insert the bars into the elastic loops and press until they click into place. This is a straightforward operation requiring no specialist skills.

Are there aftermarket straps compatible with the P3B/01?

Yes, the P3B/01 accepts any strap with a 28mm lug width. Milano Straps offers a curated selection of 28mm straps in leather (calf, alligator, vegetable-tanned), tactical NATO, and FKM rubber. All straps are verified for compatibility, with construction tolerances ensuring perfect fit to the original lugs without case damage.

What is the typical lifespan of a leather strap on the P3B/01?

A quality artisanal calf leather strap, subject to moderate daily use, maintains structural integrity for 18–24 months. With careful maintenance (avoiding prolonged moisture, protecting from abrasion), lifespan can extend to 36 months. Vegetable-tanned leather develops natural patina that communicates dignity to the P3B/01's design. Alligator, being denser, can last 3–4 years. NATO and FKM rubber last indefinitely, with visual degradation more pronounced than structural failure after two years of intensive use.