Rare Longines Gold Watch Help

[WatchCollector56]

This watch was bought this morning from an estate sale. I am having trouble finding this specific watch, but have seen other chronograph types going for a lot of money online. It isn't marked on the outside, but appears to be a completely gold case. I was hoping if someone could tell me more about the watch? and its value?
Thank you!

 

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[NOLA_Ken]

Take it to a good jeweler and have them open the case. There should be info such as serial numbers inside on the back, and also that's where I'd expect any hallmarks to be.

 

[Montana Jim]

This looks somewhat like yours...

Source: Vintage Longines Flyback Chronograph 12.68z Antique Swiss Watch by Farfo

Dial:
Two Tone Gold and Silver Dial With Applied
Gold Hour Markers and Matching Gold
Hands. Signed Longines. Large Subsecond
Register at 6:00 and Outer Black Minute
Track. Dial in Excellent Condition with Minor
Signs of Age.

Movement:
Swiss Made Longines Caliber 12.68Z Stop
Seconds Movement Signed Lonignes Watch
Co., Swiss and Numbered 6120684.

Dimensions:
31mm Diameter (Excluding crown) x 39mm
Top to Bottom..

Condition:
Excellent Condition. Comes with a 6 Month
Warranty.

Price:
WAS $2999 - SALE NOW $2499