The Roaring Twenties 1939

This James Cagney and Humphrey Bogart prohibition era gangster film features a short model ship sequence. The shots depict a freighter being intercepted by a Coast Guard launch. There is also an establishing shot of a miniature lighthouse.

The miniatures were supervised by Byron Haskin who was the head of Warner Bros special effects dapartment at the time.

I found the entire film on Internet Archive.org.
Internet Archive Roaring Twenties 1939

Fear Is The Key 1972

From a book  and screenplay by Alistair MacLean comes this obscure thriller with some miniature submersible shots supervised by Derek Meddings.

The submersible is a strange boxy truck like design without the usual spherical or cylindrical hull shapes so prevalent in underwater craft.
There is also an underwater crashed Douglas Dakota wreck miniature environment.
The miniatures were shot at Bray Studios in England.

While the movie was originally widescreen as the letterboxing of the title and end credits show, this release has been cropped to the 3:4 aspect ratio for old school television.