1932: The team of Pyrmont Amateur SC, Australia

The team of Pyrmont Amateur Swimming Club, New Southe Wales, Australia in 1932
Source: https://pyrmonthistory.net.au/locations/pyrmont-baths/

1938, London: Italy vs France 1-1

Italy Vs France (1-1) at the Empire Pool Wembley during the 1938 London, European Swimming Championships.

Source: AP archives 

1938, London: The team of France

The team of France at the Empire pool Wembley during London 1938 European Championships. France has been ranked in the seventh place. From Left to Right : Delporte, Van de Casteele, Emile Bermyn, Dewash, Padou, Diener, Desbonnet, Busch et Lefèvre. 

Source: Emile Bermyn family archives

1935: Drawing by Jean Jacoby

Poster "Grande Fete Internationale de Natation" by Jean Jacoby (Luxembourg - Sport & Olympic artist) in 1935

1930 The National team of Hungary

The National team of Hungary in 1930. From L-R: Ivády Sándor, Barta István, Vértessy József, Homonnai Márton, Németh János, Keserű Alajos, Keserű Ferenc 

Source: Hungarian National Museum

1933: KPK Korčula Vs. HMS Queen Elisabeth team

The teams of KPK Korčula and HMS Queen Elisabeth, after their match in Korčula in 1933.

Source: courtesy of Asja Silić Lozica

1931: Match Primorac Kotor Vs. Jadran Herceg Novi

The teams of Primorac Kotor and Jadran Herceg Novi in the friendly game held in the bay "Italian park" at Kotor in 1931.

Source: courtesy of Vasko Vuskovic

1931: Primorac VK Kotor and Jadran Herceg Novi

The teams of Primorac Kotor and Jadran Herceg Novi after their friendly game in the bay of the "Italian park" of Kotor in 1931.

Source: courtesy of Vasko Vuskovic

1936, Berlin: The golden Hungarians

The National team of Hungary gold winners in Berlin 1936 Olympic Games From L-R: Halassy, Molnar, Brandy, Tarics, Nemeth, Homonnai, Brody, Bozsik.

Source: http://www.sportmuzeum.hu/

1939: The team of Società Sportiva Lazio

The team of Società Sportiva Lazio, in 1939. Standing L-R: De Giovanni, Caucia, Baldomoro, Penza, Tamagnini, Scatralia, Cosimo. Kneeling L-R: Berti, Persico, Ognio, Candella.

Source: http://www.sslazionuoto.it/

1936: The team of C.O.S "Nageurs Lillois"

The team of Cercle Ouvriers Sportif (C.O.S) "Les nageurs Lillois" in 1936. From L-R: Aubut, Hermez, Delmar, Delmotte, Van Coweberghe, Delmelerie, Vandenberghe, Hellin.

Source: personal collection

1934, Magdeburg: The National team of Italy

The Italian National team that took part in Magdeburg 1934 European Championships (12-19 Aug 1934). Standing L-R: Luigi Fabiano (S.S. Mameli), Giordano Goggioli (R.N.Florentia), Enzo Zabberoni (R.N.Florentia), Mario Majoni (R.N.Camogli), Paolo Costoli (R.NFlorentia), Lorenzo Pastore (R.N.Camogli). Kneeling L-R: Luciano Scazzola (R.N.Milano, Giuseppe Valle (R.N.Florentia). Missing from the picture Sirio Banchelli (R.N.Napoli), Giordano Fuga (Ginnastica Triestina).

Source: http://www.laziowiki.org/wiki/Zabberoni_Enzo

1931, Paris: The German National team

The German National team that competed at the European Championships, Tourelles, France, in 1931

Source: http://www.gettyimages.it

1930: The Plaistow United Swimming Club team.

The team of Plaistow United Swimming Club at Balaam Street Baths in 1930. (City of Plaistow is situated in East London at the south of West Ham)

Source: http://www.newhamphotos.com/

1932, Los Angeles: The National team of Japan

The National team of Japan, prior to departing for the Los Angeles 1932 Olympic Games. Seating L-R: Shuji Doi, Yatsuro Sakauye, Akira Fujita, Takashige Matsumoto and Ryuji Takebayashi. Standing L-R: Kiyoshi Murai, Iwao Tokitoh, Seibei Kimura and Toksuke Sawumi.  The Japanese  team was ranked 4^th in Los Angeles 1932 Olympics.
Source: HISTORIC IMAGES GALLERY

1938: The winners of Western Province, South Africa

The 1938 Western Province Water Polo Team. National champions and Currie Cup Winners in Cape Town. Seated L-R: Glegg,S. Collins, P. Herbstein (Manager),I Berkovitch, M. Jurisch. Standing from L-R: F Grühn, R.J.Loydell, L. Maister & D, Collins, Inset J. King

Source: South African Waterpolo History

1936: The Northern Transvaall Team, South Africa

The Northern Transvaal Team winner at the 1936 Currie Cup Championships held in Bulawayo, Rhodesia. Standing L-R: G. N. Van den Berg, S Beales, P. Venter, F. Horn and M. Nykamp. Seated L-R: F. Dyason, A.V. Nunn and D. Miller

Source: South African Waterpolo History

1932, Los Angeles: The Golden Hungarians.

The team of Hungary gold winner in Los Angeles 1932 Olympic Games. The team: Barta István, Bródy György, Halassy Olivér, Homonnai Márton, Ivády Sándor, Keserű Alajos, Keserű Ferenc, Németh János, Sárkány Miklós, Vértesy József

Source: http://www.nemzetisport.hu

1936, Berlin: Water Polo action in the Olympic Pool

Action during Berlin 1936 Olympic Games in the full house competition pool.
Source: private collection 

1930: The team of Cercle Natation de Spa, Belgium

The team if Cercle Royal de Natation de Spa, Belgium in 1930

Source: private collection