Hi.
I am new here, but somewhat familiar with Longines from this period.
I agree with Tony C. It could be a re-dial, but I am almost 100% sure it is not.
I have 3 Longines caliber 701, none of them are re-dialed. (one is the same ref# as mentioned here.)
And they are all marked Sport Chief.
Sport Chief was also found in Longines watches with caliber 280 and 12.68Z (and 30L, 30LS, 280)
Longines used model names like Flagship, Sport Chief, Silver Arrow on many different watches/calibers.
As to Longines archives - they are great, but not always 100% correct.
For instance this Sport Chief, they claim is "a yellow gold wristwatch", has a gold cape, and is gold on steel.