--- title: "RUBY MASK BUT BUTTERFLY case on Skin.club: odds, RTP & drops" description: "RUBY MASK BUT BUTTERFLY ($2.67) on Skin.club, a CS2 case site: no published odds, observed 65.47% over 986 openings in 30 days." url: https://gambatracker.com/cases/skinclub/cc-aa99ac139 rendered: 2026-11-13T06:45Z --- [Case sites](https://gambatracker.com/case-sites) / [Skin.club](https://gambatracker.com/case-sites/skinclub) / [RUBY MASK BUT BUTTERFLY](https://gambatracker.com/cases/skinclub/cc-aa99ac139) # [Skin.club](https://gambatracker.com/case-sites/skinclub) · RUBY MASK BUT BUTTERFLY A case on Skin.club, first seen 13 Nov 2026. Every value is Skin.club's own item price. [24h](https://gambatracker.com/cases/skinclub/cc-aa99ac139?window=24h) [7d](https://gambatracker.com/cases/skinclub/cc-aa99ac139?window=7d) [30d](https://gambatracker.com/cases/skinclub/cc-aa99ac139) [All](https://gambatracker.com/cases/skinclub/cc-aa99ac139?window=all) Price · $2.67 Advertised RTP · — · no catalog Observed RTP, 30d · 65.47% · 986 openings, sample method Variance · — · needs odds Tail share · — · needs odds Below price · — · needs odds ## Advertised vs observed · per window, 95% band and the advertised marker observed, 95% band outside band small sample 24 hours · 986 openings · below min 7 days · 986 openings · below min 30 days · 986 openings · below min since tracking started · 986 openings · below min 17.0% 65.3% 113.5% **Small sample.** 986 openings: below the 1,000 the sample method needs, so no verdict. ## Windows · the test per window | Window | Openings | Observed | Dev. | Method | | --- | --- | --- | --- | --- | | [24h](https://gambatracker.com/cases/skinclub/cc-aa99ac139?window=24h) | 986 | 65.47% ±47.6 | — | sample | | [7d](https://gambatracker.com/cases/skinclub/cc-aa99ac139?window=7d) | 986 | 65.47% ±47.6 | — | sample | | [30d](https://gambatracker.com/cases/skinclub/cc-aa99ac139) | 986 | 65.47% ±47.6 | — | sample | | [All](https://gambatracker.com/cases/skinclub/cc-aa99ac139?window=all) | 986 | 65.47% ±47.6 | — | sample | Enough sample: 100 openings and 5 expected rare hits (odds method) or 1,000 openings (sample method). ## Items, odds and values · none published **No catalog** Skin.club publishes no catalog; the case is known from the drops that named it. Values are Skin.club's own item prices; EV share = odds × value ÷ EV. Hot / cold compares observed drops of each item with odds × openings; small expected counts are left blank. ## Biggest drops · from this case, by value [★ Huntsman Knife | Doppler (Factory New) (Factory New) (Phase 2) knife · Immortal · Phase 2](https://gambatracker.com/items/huntsman-knife-doppler-factory-new-factory-new-phase-2) Hidden $2.67 $351 131.4x 2026-11-13 05:34 UTC [★ Huntsman Knife | Doppler (Factory New) (Factory New) (Phase 2) knife · Immortal · Phase 2](https://gambatracker.com/items/huntsman-knife-doppler-factory-new-factory-new-phase-2) Hidden $2.67 $351 131.4x 2026-11-13 05:29 UTC [★ Sport Gloves | Slingshot (Field-Tested) gloves · extraordinary](https://gambatracker.com/items/sport-gloves-slingshot-field-tested) Hidden $2.67 $283 105.9x 2026-11-13 05:50 UTC [★ Sport Gloves | Slingshot (Field-Tested) gloves · extraordinary](https://gambatracker.com/items/sport-gloves-slingshot-field-tested) Hidden $2.66 $282 106.0x 2026-11-13 06:31 UTC ## Latest drops · newest first [All Latest drops →](https://gambatracker.com/drops?casino=skinclub&case=cc-aa99ac139) [Sealed Graffiti | X-Knives (Princess Pink) graffiti · Common](https://gambatracker.com/items/sealed-graffiti-x-knives-princess-pink) Hidden $2.66 $0.01 0.00x 2026-11-13 06:42 UTC [Sealed Graffiti | X-Knives (Princess Pink) graffiti · Common](https://gambatracker.com/items/sealed-graffiti-x-knives-princess-pink) [Harz5](https://gambatracker.com/players/skinclub/Harz5) $2.66 $0.01 0.00x 2026-11-13 06:42 UTC [★ Sport Gloves | Slingshot (Field-Tested) gloves · extraordinary](https://gambatracker.com/items/sport-gloves-slingshot-field-tested) Hidden $2.66 $282 106.0x 2026-11-13 06:31 UTC [P250 | Muertos (Minimal Wear) weapon · classified](https://gambatracker.com/items/p250-muertos-minimal-wear) Hidden $2.66 $12.88 4.84x 2026-11-13 06:31 UTC [Sealed Graffiti | X-Knives (Princess Pink) graffiti · Common](https://gambatracker.com/items/sealed-graffiti-x-knives-princess-pink) Hidden $2.66 $0.01 0.00x 2026-11-13 06:31 UTC [Sealed Graffiti | X-Knives (Princess Pink) graffiti · Common](https://gambatracker.com/items/sealed-graffiti-x-knives-princess-pink) [Puleozaurul](https://gambatracker.com/players/skinclub/Puleozaurul) $2.66 $0.01 0.00x 2026-11-13 06:31 UTC [Sealed Graffiti | X-Knives (Princess Pink) graffiti · Common](https://gambatracker.com/items/sealed-graffiti-x-knives-princess-pink) Hidden $2.66 $0.01 0.00x 2026-11-13 06:31 UTC [Sealed Graffiti | X-Knives (Princess Pink) graffiti · Common](https://gambatracker.com/items/sealed-graffiti-x-knives-princess-pink) Hidden $2.66 $0.01 0.00x 2026-11-13 06:31 UTC [Sealed Graffiti | X-Knives (Princess Pink) graffiti · Common](https://gambatracker.com/items/sealed-graffiti-x-knives-princess-pink) Hidden $2.66 $0.01 0.00x 2026-11-13 06:31 UTC [Sealed Graffiti | X-Knives (Princess Pink) graffiti · Common](https://gambatracker.com/items/sealed-graffiti-x-knives-princess-pink) [Puleozaurul](https://gambatracker.com/players/skinclub/Puleozaurul) $2.66 $0.01 0.00x 2026-11-13 06:31 UTC ## Catalog changes · price, advertised RTP and contents, per capture | Captured | Price | Advertised | Items | | --- | --- | --- | --- | Each opening is tested against the capture in force when it happened; a price or odds change starts a new one. listed best hit $351 (131.4x) 18+ **Case opening is gambling with skins as the currency.** At 65.5% RTP, every $100 put into cases returns $65.47 on average: an expected loss of $34.53 per $100, before any one lucky or unlucky opening. A big drop here says nothing about the next one. [BeGambleAware](https://www.begambleaware.org/) [Help & limits](https://gambatracker.com/responsible-gambling) How these figures are produced and labelled: https://gambatracker.com/llms.txt