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 as a special collaboration between Wtopia and Sunizumi Shoten.

Rather than using a single metal, the body is crafted from a proprietary Wtopia blend of bronze, copper, and nickel silver, creating a distinctive tone and surface character unique to the piece.

The body is accented with Wtopia’s signature bronze floral motif and silver skull inlay, combining warm and cool metal tones in a compact sculptural form.

Measuring approximately 32.5 × 16 × 17 mm and weighing approximately 37 g, the piece is compact enough for everyday pocket carry while maintaining a satisfying tactile presence in the hand.

It can be enjoyed as an EDC challenge coin, tactile worry stone, or collectible piece of handmade Japanese metalwork.

Adding to its ONE-OFF identity, the piece carries four individually applied marks:

• Hand-applied Wtopia signature
• Sunizumi ornamental mark
• Tokyo mark
• Floral mark

A hand-signed certificate card is also included with the piece.

Specifications

• Collaboration: Wtopia × Sunizumi Shoten
• Type: ONE-OFF EDC Challenge Coin / Worry Stone
• Main Material: Proprietary Blend of Bronze / Copper / Nickel Silver
• Inlay: Wtopia Bronze Floral Motif + Silver Skull
• Dimensions: Approx. 32.5 × 16 × 17 mm
• Skull Dimensions: Approx. 16 × 12 mm
• Weight: Approx. 37 g
• Marks: Hand Signature / Sunizumi Ornamental Mark / Tokyo Mark / Floral Mark
• Includes: Hand-Signed Certificate Card
• Made in Japan

Material & Care

Bronze, copper, nickel silver, and silver naturally develop oxidation, tonal variation, and patina through exposure to air and regular handling.

These changes are part of the character of handmade metalwork and will gradually give the piece its own individual appearance.

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