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we'd like to have a challenge coin made for Hyperledger. The coin will be 1.75" in diameter. I'd like a design that would not need enamel as that increases the price. I'd also like a flat spot on the back that would be suitable for engraving a person's name. 
Concept: Model on layout of the US nickel
Face side: Hyperledger logo instead of Jefferson head, change 'In God We Trust' motto to 'In Open Source We Trust', for date use 2021 and remove 'Liberty'
Reverse side: Flat rectangle in space where Monticello is, around the edge have 'Hyperledger' at top and then circling the rest of the coin have 'Community * Code * Collaboration * Contribution'
Coins with spots to be engraved:
Existing poker chips:
