There were 18 foreign warships present at the 1937 Spithead review, as follows:

Battleship - MORENO - Argentina
Cruiser - CUBA - Cuba
Coastal Defense Ship - NIELS IUEL - Denmark
Minelayer - KALEV - Estonia
Coastal Defense Ship - VAINAMOINEN - Finland
Battleship - DUNKERQUE - France
Pocket BB - GRAF SPEE - Germany
Cruiser - GIORGIOS AVEROFF - Greece
Cruiser - ASHIGARA - Japan
Cruiser - JAVA - Netherlands
Sloop - BARTOLOMEU DIAS - Portugal
Destroyer - BURZA - Poland
Destroyer - REGINA MARIA - Romania
Destroyer - CISCAR - Spain
Coastal Defense Ship - DROTTNING VICTORIA - Sweden
Destroyer - KOCATEPE - Turkey
Battleship - NEW YORK - United States
Battleship - MARAT - USSR