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. If you have no relationship with the seller, then I apologize
. Here is a quick overview on how to "read" a VC:
So here on the inside of the caseback is the model reference number "7391", proof mark for 18k gold, Helvetia Head pre-1995 Swiss origin mark, manufacturers mark for V&C, and the actual case makers mark "Key 23" (good old Eggly) as case manufacture was let out to other firms.
The movement itself contains a wealth of information. Caliber indication "K1120" appears both on the base plate and movement, while serial number on lower left is "637702". Gyromax freesprung balance and inscription on rotor for 36 jewels all confirm its correctness. Barely visible between the caliber and serial number is the Geneva Seal.
That the case serial number that appears on the outside of the caseback is a clue to it's 1970's origin, as does the use of that particular movement and the style of the piece. Together with the movement serial, VC archives can confirm the two belong together and when the watch was manufactured, as Alex has already done.
Dial details indicate an original unrestored (and very dirty) dial. The "Swiss" at 6 o'clock is very difficult to restore, as is the small accent in "Genève". Only the most expert attempt at cleaning should be undertaken with this dial! This watch has two hands, no seconds and no date, with is absolutely right for the K1120 movement.