Help identify watch

[tones_30]

Hi,
I have inherited my grandfather's watch collection and would like some help identifying a certain watch.
It is a Unicorn Amphibian 17 Jewel Incabloc. I have attached an image.
The only info I have been able to find on the internet is that Unicorn may have been a brand of Rolex.
Any help would be much appreciated.
Thanks

[offrdmania]

The Unicorn name was patented in 1919, Rolex used it until circa 1933. During this time they were fitted with Rolex movements.

Later Unicorn watches were a brand of AS (Adoloph Schild) and were a completely separate entity from Rolex.
They used Schild movements and depending on beat rate, were AS caliber 1711 (if 18000 A/h) or AS caliber 1901 (if 21600 A/h).

Unfortunately, a Unicorn made in the 1950s is no longer a Rolex product.

[Richard Carver]

Originally Posted by offrdmania

The Unicorn name was patented in 1919, Rolex used it until circa 1933. During this time they were fitted with Rolex movements.

Later Unicorn watches were a brand of AS (Adoloph Schild) and were a completely separate entity from Rolex.
They used Schild movements and depending on beat rate, were AS caliber 1711 (if 18000 A/h) or AS caliber 1901 (if 21600 A/h).

Unfortunately, a Unicorn made in the 1950s is no longer a Rolex product.

Wow, great answer!

[offrdmania]

Originally Posted by Richard Carver

Wow, great answer!

Quoting the author

[Tools]

Additionally, Rolex never used the Incabloc shock system.