I'm sorry that I didn't see your post earlier.
When I initially tried to identify the car in your photos, I thought that it was 1927 Packard Fourth Series sedan. Now another one of our 'experts' has come up with some photographic evidence that makes it look more likely that it's a 1928 early Fifth Series car, very possibly a Model 526 (see:
http://www.shannons.com.au/auctions/...H4YY70I53EZHC/ which is a Packard that was sold in England, but appears to be the same model as yours except for the RHD steering wheel). With the limited views of the car, it's nearly impossible to ascertain the exact model number - if we had a full side photo of the car and a photo of the engine, it would be a LOT easier!
I hope that the year and series number will satisfy you father's needs.
Dave B.