A secret agent possesses a ring that makes him invisible for a short time, once every 10 hours. He is in pursuit of an evil criminal mastermind but, at the same time, must evade an enemy agent who also wants the ring.
| Release Date | August 13, 1967 | |
|---|---|---|
| Status | Released | |
| Original Title | Matchless | |
| Runtime | 1h 45min | |
| Budget | — | |
| Revenue | — | |
| Language | Italian, English | |
| Original Language | English | |
| Production Countries | Italy | |
| Production Companies | DDL Cinematografica | |