Bull — Crypto Stamp 4.0

About the Motif

The bull is one of the world's oldest economic symbols. In stock market parlance, "bull market" denotes a phase of rising prices — derived from the animal's characteristic attack movement, thrusting upward with horns. In contrast, "bear market" describes falling prices, named after the bear's downward strike with paws.

In crypto, the adoption of these terms is complete: "bullish" means optimistic, "bull run" describes phases of exponential price gains as in 2017, 2020/21, and again in spring 2024. Choosing the bull for the first international joint edition plays directly on this economic symbolism — a statement by the postal services that the Crypto Stamp series is gaining international momentum.

Design Specifics of the Austrian Variant

CS 4.0 carries a silver bull's head in the upper-left corner of the stamp block. The background uses Austrian national colors red-white-red, underlaid with a crystal structure — a detail that visually reinforces the crypto reference layer without using explicit blockchain symbolism. As a botanical element, an edelweiss pattern overlays the flag, marking the stamp unmistakably Austrian.

On the reverse of the stamp block, the unicorn logo of the Crypto Stamp brand appears in the upper-right corner — a nod to CS 1.0 Unicorn of 2019, functioning as the heraldic emblem of the entire Crypto Stamp series. On the front upper right is the postal value designation R (registered mail); lower right a QR code to the digital wallet; lower left country and year.

Augmented Reality Feature

The central technical innovation of CS 4.0 is the augmented reality function. Holding an NFC-capable smartphone over the stamp block automatically opens a webpage that combines two functions: first, authentication of the physical stamp block via the NFC chip; second — and this is new — an AR camera view in which the bull "comes to life" and is overlaid onto the collector's real environment.

The feature runs directly in the mobile browser without separate app installation, significantly reducing the barrier for collectors. The AR animation shows a 3D-modeled bull rotating around its own axis, positionable in the collector's surroundings. The smartphone display thus becomes an extended stamp block — a deliberate shifting of the physical-digital boundary, which would be expanded further in CS 5.0 and subsequent editions.

Polygon Migration

With CS 4.0, Österreichische Post completes the switch from Gnosis Chain (formerly xDai, introduced with CS 3.0) to Polygon as the primary sidechain. Polygon emerged in 2022 as the Ethereum Layer 2 with the highest adoption and liquidity. NFT marketplaces like OpenSea and Magic Eden support Polygon natively.

Tokens continue to be minted on the Ethereum mainchain as ERC-721, but the bulk of collector activity now takes place on Polygon. Via the Polygon bridge, tokens can move between chains in either direction. The Polygon migration marks the end of the xDai/Gnosis phase of the Crypto Stamp series and establishes Polygon as the standard for all follow-on editions.

Material and Security

CS 4.0, like predecessor editions, is produced at Variuscard in Vienna. The stamp paper is Invercote Creato matt at 240 g/m² (reinforced), the stamp itself measures 43 × 53 mm, the stamp block 53.98 × 85.6 × 0.79 mm — exactly the ISO bank card format. Security features for the first time include invisible UV ray markers and forensic security elements. The NFC chip with 384 bytes AES-SUN NDEF encryption is significantly more capable than predecessor versions.

Variant Distribution

Like all Mainstream editions, CS 4.0 follows the five-tier color rarity model. Given a total mintage of 100,000 and the established distribution (1/6.7/13.3/26.7/52.3%), the resulting per-color counts are approximately:

• Black: ~52,300 pieces
• Green: ~26,700 pieces
• Blue: ~13,300 pieces
• Yellow: ~6,700 pieces
• Red: ~1,000 pieces

Exact per-color counts have not been published by Österreichische Post for CS 4.0 — the estimate is based on the distribution documented for CS 1.0, 2.0, and 3.1.

Secondary Market and Collector Value

On the secondary market, CS 4.0 trades both individually and as a set with the NL variant. At launch, PostNL offered a special "Duo Box" containing both stamps plus an exclusive 3D bull mask to assemble — strictly limited and available only through the PostNL webshop.

Black CS 4.0 stamps typically circulate between 30 and 90 EUR on Delcampe, eBay, and through specialized stamp dealers. Green and blue variants command premium prices. Red Bulls (estimated ~1,000 pieces) achieve collector prices in the four-figure EUR range depending on condition and special factors such as token-ID patterns.

Position in the Series

CS 4.0 marks several structural turning points in Crypto Stamp history: first international joint edition, first AR animation, first Polygon edition. It thus stands at the transition from the national to the international phase of the series and lays the technical foundation for the subsequent joint editions with Luxembourg (CS 5.0 Lion 2023) and Belgium (CS 5.0 Dragon 2024). The Gold Edition Bull of 22 November 2022 supplements CS 4.0 with a strictly limited collector variant featuring an embedded gold bar.