Who knows this collection?

[Motorremise]

I am researching the history of the great Cadillacs from the 1930s. In this context, this ad was placed a few years ago.
https://classiccars.com/listings/view/973840/1931-cadillac-370a-v12-convertible-coupe-for-sale-in-scottsdale-arizona-85260
There were several cars in the collection. Can anyone tell me what collection it was and who the collector was?
It must have been an introverted person who owned vehicles for 35 years, restored them at great expense and then did not drive or display them.
I am grateful for any tips also gladly by PM.
Regards
Clemens Heddier
Coesfeld, Germany

1903 Knox Waterless
1914 Cadillac Landaulet Coupe
1922 Detroit Electric
1931 Cadillac Town Sedan

[Cadillac Jack 82]

If you're interested I could go inspect them for you.  I live about 20 minutes from Scottsdale.

[Motorremise]

Thanks for your offer. But this car was sold years before. I am looking for the pre-owner and collector. The advertisement said:


This work of art has less then 10 miles on the complete, every nut and bolt restoration that was just finished. The restoration on the car took many years to complete by a true master restorer. This car is being offered for sale, for the estate of the previous owner who recently past away before he ever got a chance to drive and enjoy it. He owned the car for over 35 years and this first time this car has ever been offered to the public since.[/size]

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Greetings from Germany[/size]

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Clemens[/size]