| Dial | Fake | Tics on the subdial don't extend to the edge. Later fakes dials have remedied this flaw. Faked patina. indicies at 10:00, 1:00, 2:00 and 5:00 have unevenly shaped lume plots. |
| Bracelet | Aftermarket | |
| Inner Bezel | Aftermarket | |
| Outer Bezel | Aftermarket |
| Dial | Genuine |
| Inner bezel | Genuine |
| Outer bezel | Genuine |
| Crown | Aftermarket |
| Dial | Genuine | |
| Inner Bezel | Genuine | |
| Outer Bezel | Genuine | at 140 marking, the horizontal line at the 4 almost touches the 0 |
| Case | Genuine Unpolished |
| Inner Bezel | From the wrong model |
| Dial | Fake |
| Hands | Aftermarket |
| Inner Bezel | Aftermarket |
| Outer Bezel | Genuine |
| Bracelet | Wrong model. The Speedtimer came with a Speedtimer bracelet |
| Case | Finish does not match original. Too much metal has been taken off as evidenced by the lack of metal above the lower pusher |
| Case back | Polished |
| Pushers | Aftermarket, or possibly polished. Should have beveled edges |
| Dial | Genuine |
| Case Finish | Original |
| Dial | Fake | Lacks subtle vertical grain. Paint is flat |
| Sub Dial Hand | Aftermarket | The sub dial hand is deeper red than the chrono seconds hand |
| Chronograph seconds hand | Genuine | A proper "tomato red" seconds hand. The blue dial watches have tomato red chrono hands while the yellow dial ones have deeper crimson red hands |
| Case back | Wrong model | This is most likely a 6139-6002 but the case back says May 1969 6139-6000. A 1969 watch would have a "proof" dial, a notched case, a 2 piece sweep hand |
| Movement | This is a 6139B. A 1969 watch would have a 6139A. The rotor is corroded, a sign the watch should be avoided. The movement is a 17 jewel movement which is an American market version. A 6139-6000 is a Japanese market version which would have a 21 jewel movement |
| #1 | American market | 17 jewel movement. American versions say "Seiko Time Corp." on the rotor |
| #2 | Rest of the world (non-American, non-JDM) | 17 jewel movement, no rotor text |
| #3 | Japanese domestic market version | 21 jewel movement, no rotor text |
| #1 | All original, 1977 | Has correct "blood red" chrono hands |
| #2 | All original, 1978 | Has correct more orangish "tomato soup" chrono hands |
| #1 | "Proof" dial, April 1970 | All original |
| #2 | Resist dial, May 1970 | All original, Notched case and 2 piece sweep hand |
| #3 | No text dial, Feb 1978 | All original |
