Butterfly Knife Doppler phases
The Doppler has 7 versions, each with its own paint index: Phase 1, Phase 2, Phase 3 and Phase 4, plus Ruby, Sapphire and Black Pearl. Right now Phase 2 is the priciest numbered phase in Factory New and Phase 3 the cheapest. Valve doesn't publish phase odds, so the phase is only visible on the knife itself or on a phase-tagged listing.
| Version | Paint index | FN from | MW from | Listings |
|---|---|---|---|---|
| Phase 1 | 418 | $2,144 | $2,559 | 21 |
| Phase 2 | 618 | $3,947 | $4,066 | 37 |
| Phase 3 | 420 | $1,979 | $2,603 | 77 |
| Phase 4 | 421 | $3,182 | $2,941 | 14 |
| Ruby | 415 | $10,650 | $9,704 | 15 |
| Sapphire | 619 | $7,174 | $6,290 | 25 |
| Black Pearl | 617 | $13,508 | — | 1 |
Rare Butterfly Knife Doppler patterns
Within a phase, the pattern seed decides how much of the blade shows the phase's best color. Collectors pay extra for the strongest examples: mostly-pink Phase 2s, mostly-blue Phase 4s and dark Phase 1s.
| Phase | Premium patterns | What collectors look for |
|---|---|---|
| Phase 1 | Dark seeds | A near-black playside that resembles a Black Pearl |
| Phase 2 | Max Pink seeds | Pink and purple across the blade, with little black |
| Phase 3 | Green and blue seeds | A strong green tone across the blade |
| Phase 4 | Max Blue seeds | Mostly blue, close to a Sapphire look |
Butterfly Knife Doppler float and wear
The ★ Butterfly Knife | Doppler's float runs from 0.00 to 0.08, which covers Factory New and Minimal Wear. Within such a narrow range the wear difference is barely visible, so phase and pattern matter far more than float.
Which cases drop the Butterfly Knife Doppler?
The Butterfly Knife | Doppler drops from 2 cases as a rare special item. In each case, any knife is 0.26% per opening and this finish in any phase is about 1 in 11,538, assuming every rare special item is equally likely.
| Case | Weekly drop pool | Chance per opening | Case price |
|---|---|---|---|
| Spectrum Case | No longer drops | 0.009% · 1 in 11,538 | — |
| Spectrum 2 Case | No longer drops | 0.009% · 1 in 11,538 | — |
About the Butterfly Knife Doppler
The ★ Butterfly Knife | Doppler was added in March 2017.
“This is a custom-designed balisong, commonly known as a butterfly knife. The defining characteristic of this weapon is the fan-like opening of a freely pivoting blade, allowing rapid deployment or concealment. As a result, butterfly knives are outlawed in many countries. It has been painted with black and silver metallic paints using a marbleizing medium, then candy coated.”
“Getting lost in its color can prove fatal”









