--- product_id: 39103130 title: "Project Mc2 Secret Message Decoder Ring (Size 10)" brand: "brand: retroworks" price: "£23.11" currency: GBP in_stock: false reviews_count: 9 url: https://www.desertcart.co.uk/products/39103130-project-mc2-secret-message-decoder-ring-size-10 store_origin: GB region: Great Britain --- # Project Mc2 Secret Message Decoder Ring (Size 10) **Brand:** brand: retroworks **Price:** £23.11 **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** Project Mc2 Secret Message Decoder Ring (Size 10) by brand: retroworks - **How much does it cost?** £23.11 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/39103130-project-mc2-secret-message-decoder-ring-size-10) ## Best For - brand: retroworks enthusiasts ## Why This Product - Trusted brand: retroworks brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Size:Size 10 *** We are very sorry that it looks like the size 06 will sell out. We never anticipated the ring would be this popular in this size. Please consider the option of wearing one of the larger rings on a chain as a necklace. Thank you so much! *** This is the original ring, not the Netflix knockoff. This is the 2nd in our Secret Decoder Ring Series, the Secret Window Cipher. It is a substitution cipher, where each letter in the alphabet is replaced with a number. The top band spins, allowing the secret window to reveal a number above each letter of the alphabet. To use: Take each letter in your message, and replace it with the number shown in the window above it. MEET AT NOON becomes 15-7-7-22 3-22 16-17-17-16 Send the message to your recipient. They must have a ring (or know the substitutions) to decipher the message. More ring versions may be seen at shopretroworks.com If you are a retail store, please contact us for wholesale availability. ## Features - Project Mc2 Secret Message Decoder Ring NOV8 - This fabulous ring was ORIGINALLY created by Retroworks - Stainless steel spinner ring - Plus, it just looks cool - Comes in original collector box ## Images ![Project Mc2 Secret Message Decoder Ring (Size 10) - Image 1](https://images-na.ssl-images-amazon.com/images/I/61OPK5L7zvL.jpg) ![Project Mc2 Secret Message Decoder Ring (Size 10) - Image 2](https://images-na.ssl-images-amazon.com/images/I/71x9zqNNR7L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Decoder Ring! *by D***O on Reviewed in the United States on January 17, 2017* Just received the ring and wanted to give my few cents on what I have observed thus far:1) Solid metal build construction2) The top portion of the ring with the hidden window (numbers) spins smoothly. Not the type where it clicks one by one when you spin. However, it is fairly loose therefore does make a clinging sound if you are quickly moving your finger (i.e. typing) while wearing it3) The numbers and letters are fairly small in font. I would imagine that's to keep the ring size to a minimum4) Packaging is well made. Compact, yet eye catching5) Fits my finger perfectly. If you are planning on wearing the ring, you may want to measure the finger you are planning to put it on6) I purchased it for the price of $18.99, which in my opinion is fairly high for one ring. $15 would of been fair.Highly recommend this ring for anyone interested! ### ⭐⭐⭐⭐⭐ The craftsmanship is such that the different numbers are still distinguishable by a person with good vision or a magnifying glass (adding to the spy/fun ... *by A***R on Reviewed in the United States on July 10, 2017* Got a pair for twin relatives as a gift. Very well made. The stainless steel was too hard for several local engravers though.The cipher is scrambled, not A=1, B=2, etc..., but each ring apparently has the same scramble which makes a pair of rings as a gift possible.The size 6 ring means the numbers are a little hard to read in the viewing window. The craftsmanship is such that the different numbers are still distinguishable by a person with good vision or a magnifying glass (adding to the spy/fun factor for a kid).Very happy with this purchase! ### ⭐⭐⭐⭐⭐ Daughter Loves It *by J***S on Reviewed in the United States on August 27, 2018* Does your kid watch science shows on Netflix? She'll want one of these. My 11-yr old loves it and wants more for her friends so they can write more notes to each other without having to share the ring back and forth. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/39103130-project-mc2-secret-message-decoder-ring-size-10](https://www.desertcart.co.uk/products/39103130-project-mc2-secret-message-decoder-ring-size-10) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-04-27*