From garmindevice.xml
-<Model>
<PartNumber>006-B1376-00</PartNumber>
<SoftwareVersion>360</SoftwareVersion>
<Description>nüvi 3790</Description>

Thanks and sorry for my confusion.

Webupdater still 'sees' my device as a 3790 (refer Description) but 'treats' my device as a 34xx. (refer PartNumber).

So should be ok?