ERC721

--- # Bring your IRL cards onchain Tokenize your card for free on [Courtyard.io](https://courtyard.io/?utm_source=card-description&utm_medium=opensea). Keep it vaulted, sell with a click, or burn this NFT to have the identical physical item shipped anywhere in the world, whenever you want. [Learn more](https://courtyard.io/about/?utm_source=card-description&utm_medium=opensea). --- # Proof of Integrity The token ID of this NFT is cryptographically derived from the fingerprint of the matching physical item ("Baseball | PSA 135136140 | 1990 Donruss Grand Slammers 4 Mark McGwire | 10 GEM MINT"). [Learn more](https://docs.courtyard.io/courtyard/technology/proof-of-integrity/?utm_source=card-description&utm_medium=opensea). By purchasing, selling or owning this NFT, you agree to Courtyard.io's [Terms & Asset Management Services Agreement](https://courtyard.io/nft-terms/?utm_source=card-description&utm_medium=opensea).

Name

1990 Donruss Grand Slammers #4 Mark McGwire (PSA 10 GEM MINT)

Owner

0x0000000000000000000000000000000000000000

ID#98403721…187414

Rarity

N/A

Grader

PSA

Serial

135136140

Grade

10 GEM MINT