We present and discuss radial velocity and the very first metallicity measurements for nine evolved stars in the poorly known old open cluster NGC 7762 .
We isolated eight radial velocity cluster members and one interloper .
Radial velocities are in good agreement with previous studies .
NGC 7762 turns out to be of solar metallicity within the uncertainties ( [ Fe/H ] =0.04 \pm 0.12 ) .
For this metallicity , the cluster age is 2.5 \pm 0.2 Gyr , and falls in a age range where only a few old open clusters are known .
With respect to previous studies , we find a larger distance , implying the cluster to be located at 900 ^ { +70 } _ { -50 } pc from the Sun .
For most of the elements we measure solar-scaled abundance ratios .
We searched the literature for open clusters of similar age in the solar vicinity and found that NGC 7762 can be considered a twin of Ruprecht 147 , a similar age cluster located at only 300 pc from the Sun .
In fact , beside age , also metallicity and abundance ratios are very close to Ruprecht 147 values within the observational uncertainties .