Rare ONE-OFF Wtopia × Sunizumi Shoten Mixed-Metal EDC Challenge Coin / Worry Stone – Silver Skull

Product Description

A rare ONE-OFF EDC Challenge Coin / Worry Stone created through a special collaboration between Wtopia and Sunizumi Shoten.

Rather than using a single metal, the body is handcrafted from Wtopia’s proprietary blend of bronze, copper, and white copper, creating distinctive tonal variation, surface character, and depth throughout the piece.

The body is accented with Wtopia’s signature bronze floral motif and silver skull inlay, combining warm bronze tones with the cooler appearance of silver for a striking mixed-metal contrast.

Measuring approximately 32.5 × 16 × 17 mm and weighing approximately 45.9 g, the piece is compact yet satisfyingly dense in hand—ideal for carrying, collecting, and tactile everyday handling.

One of the most distinctive details is the collection of hand-applied markings found on the piece:

• Handwritten maker’s signature
• Sunizumi crest stamp
• Tokyo stamp
• Floral stamp

These individual markings document the identity and origin of the collaboration while emphasizing the handcrafted, one-of-a-kind nature of the piece.

A hand-signed certificate card is also included.

Designed to be enjoyed as an EDC challenge coin, tactile worry stone, or collectible Japanese metalwork piece, this is a genuine ONE-OFF collaboration made in Japan.

Specifications

• Collaboration: Wtopia × Sunizumi Shoten
• Type: ONE-OFF EDC Challenge Coin / Worry Stone
• Main Material: Proprietary Mixed-Metal Blend of Bronze / Copper / White Copper
• Inlay: Wtopia Bronze Floral Motif + Silver Skull
• Dimensions: Approx. 32.5 × 16 × 17 mm
• Skull Dimensions: Approx. 16 × 12 mm
• Weight: Approx. 45.9 g
• Markings: Hand Signature / Sunizumi Crest Stamp / Tokyo Stamp / Floral Stamp
• Included: Hand-Signed Certificate Card
• Made in Japan

Material & Care

Bronze, copper, and other copper-based metals naturally develop oxidation, tonal variation, and patina through exposure to air and regular handling.

Because the body is made from a proprietary mixed-metal composition, natural variations in color, pattern, and surface appearance are part of the individual character of the piece.

After handling, gently wipe with a soft, dry cloth. Avoid prolonged exposure to moisture, salt, acidic liquids, and harsh chemicals.