First Art Deco Skyscraper in Europe

Boerentoren, Antwerp

This 97-meter (originally 87,5 m) tower was designed by Jan Van Hoenacker and built from 1929 to 1931. Once it was the tallest office building in Europe.

Read about it (Wiki): EN NL DE

Image: @ by lewishamdreamer Flickr

Spread Your Wings

CANT Z.501 Gabbiano flying boat
Italy, 1934

Palace of Soviets, Moscow

Design: Boris Iofan, Vladimir Shchuko and Vladimir Gelfreikh
If built, it would have become the world's tallest structure (420 m). Construction started in 1937, and was terminated by the German invasion in 1941. In 1941-1942, its steel frame was disassembled for use in fortifications and bridges. Construction has never been resumed.

Read about it (Wiki, EN)
Sketch © МУАР

Battersea Power Station

Designed by Sir Giles Gilbert Scott, once it was the largest brick building in Europe.

Read about it (Wiki, EN)

Four-Wheeled Rocket

Wikow aerodynamic concept car
Czechoslovakia, 1931

Stout. Scotch. Streamline

Belgian beer truck
1930s

Zenith Special Aviators' Watch

IWC of Schaffhausen calls itself a creator of the world's first specialized aviator's wristwatch - glorious Mark IX (1936). This claim is arguable to some extent - after all, Longines' Lindbergh Watch was introduced two years earlier, and dozens of other watchmakers supplied military and civil aviators with anti-magnetic chronometers from the early 1920s.
This Swiss Zenith Special (c. 1930) served with the German Luftwaffe. Right before the WWII Zenith chronometers were the French Air Force standard issue.

Futurism

Taormina, Sicily

By Bleuboy @ Flickr

Wire Wonder

Swiss Ipsophone answering machine

Based on wire recording system, remote-controlled.
Developed by Oerlikon company
More about it in TIME magazine (1946)

Baltic Warrior

Soviet 'Project 69' battlecruiser - also known as Kronstadt class
Shown with nine 12-inch guns. Later she was redesigned to carry six Krupp 15-inch guns, similar to Bismarck main caliber.
Two ships ordered. Both hulls destroyed at the time of German invasion (1941).

Super-Farman

Farman NC.224
1937

A batch of six airframes was built for Air France - and rejected by the customer. The machines were sold to Armee de l'Air (French Air Force) and worked as military transport.

Info (FR)

President's Race

5th Masaryk Circuit
1934
Prof. Masaryk was the President of Czechoslovakia

A Contender

Soviet GOMZ Sport - one of world's two first 35-mm SLRs.
Prototype exposed in 1935
Another contender, Ihagee Kine-Exacta from Germany, appeared a bit later but was pressed into production earlier than Sport.

At Knippelsbro Bridge

Kopenhagen, Denmark
1937

Info @ Structurae (EN)
Originally uploaded by Squirmelia @ Flickr.com

Revolutionary Art

Youth magazine cover
1924

Originally uploaded by DESN 210 '09 @ Flickr

Queen of the East

Dutch 1047 battlecruiser
In fact, an improved German Scharnhorst class.
Four ordered in 1939-40. Were to be ready by 1944. None built.

See Wiki for details
Picture from Alt_Naval

Le Quatorze Juillet

A lady, a Renault and Palais de Chaillot
Trocadéro, Paris, 1938

Optical Hybrid

Swiss Alpa cameras were an unconventional mix of two technologies, reflex and rangefinder. Alpa Prisma Reflex (1949, shown above), had mirror and prism as well as viewfinder/rangefinder similar to famous Leica.
Later models like Alpa 6 (1956, shown below), were equiped only with a viewfinder.

Power Coupe

2007 Donkervoort Coupe 2.7 L

Modern Art

Cover, Milan Triennale Brochure
by Mario Sironi
1933

Trimotor. Tricolor

French Dewoitine D.338 airliner
1936

Artwork © Shigeo Koike

Soviet Streamline

GAZ-A Aerodynamic Concept
1934

Mr Roboto by Azimuth

The Citadel

London Underground HQ
55 Broadway, London
Architect: Richard Holden
1927-1929

Deco Crystal

Decanter by Karl Palda
Czechoslovakia, 1930

Aerocover

The airplane is Heinkel He 70 Blitz
1937

4th of July

 Streamlined street car passing Washington Monument

Washington, D.C., circa 1938

via Shorpy

Diesel Battleship

Admiral Graf Spee was a Deutschland class pocket battleship. Launched in 1934, she was named after the World War I Admiral Graf Maximilian von Spee who died, along with two of his sons, in the first Battle of the Falkland Islands on 8 December 1914.
Together with her sisterships it represented a unique capital ship concept - very compact, heavily armed, diesel-propelled. Her range was quite remarkable - 19,000 nautical miles at 10 knots.
Damaged by the British cruiser artillery in the famous Battle of the River Plate, Admiral Graf Spee was scuttled near Montevideo, Uruguay, 17 December 1939.

Angle of View

A Girl With the Leica
Photo by Alexander Rodchenko
c. 1934

Info (EN)

Sky Warriors

Stained glass in the church in Crewe, UK.
Installed in memoriam of the RAF airmen
1949

Industrial Currency

5 Korun (five crowns) silver coin
Czechoslovakia, 1925