Wikimedia Commons

BL 5.5 inch Medium Gun at Duxford Aerodrome. Also uploaded om Wikimedia Commons: commons.wikimedia.org/wiki/File:19870830-Duxford-BL_5.5_in_Medium_Gun.jpg This work is licensed under a Creative Commons Attribution 4.0 International License .

Preserved DeHavilland DH-104 Dove aircraft G-ALFU (c/n 04234) of CAA at Duxford Aerodrome/EGSU (1987). From 1948 to 1972 it belonged to the Civil Aviation Flying Unit at Stansted Airport. This aircraft was removed to Duxford in 1975. It still survives at Duxford, now relocated within Hangar C (Air and Space collection). This photograph was also uploaded on Wikimedia Commons as commons.wikimedia.org/wiki/File:19870830-EGSU-DH104-GALFU.jpg This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

Ro/PAX ARIADNE, SXVN (IMO:6704402) of Minoan Lines in Piraeus Port. Originally uploaded on photopic.net as: cyborg.fotopic.net/p41708687.html This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

INDIA: postage stamp of 3.05 R commemorating the inauguration of a Tropospheric scatter (troposcatter) radio link between India and the Soviet Union. Terminal stations were located at Srinigar in Kashmir and at Dangara in Tajikistan, a distance of 685 km. The link operated on 800-900 MHz with 10 kW on each channel and carried 12 telephone channels, using Soviet made equipment.

Douglas DC-3 (C-47.R4D-7) Dakota SX-ECF of the Hellenic CAA at Athens Hellenikon Airport LGAT, 23 April 1973, by RuthAS on Wikimedia Commons under a CC-BY-4.0 free license. Wikimedia Commons file: commons.wikimedia.org/wiki/File:Douglas_C-47.R4D-7_SX-ECF_Hellenic_CAA_Athens_23.04.73.jpg This work is licensed under a Creative Commons Attribution 3.0 International License .

UK: Pre-decimal stamp of 10 shillings of the first high value Machin issue (1969).

UK: Block of four 1D Machin stamps of the first issue (1967) cancelled with a round postmark "BOGNOR REGIS - SUSSEX" on 29 SEP 1968.

QSL card sent by SV1AA to VE1XY, confirming a 28 MHz phone QSO in 1960.

Logo of the Radio Amateur Association of Greece (RAAG), 1958. Public domain image, copied from Wikimedia Commons. Wikimedia Commons file: commons.wikimedia.org/wiki/File:Radio_Amateur_Association_of_Greece_(logo).png

Amateur radio QSL stamp issued by USKA , the Swiss Amateur Radio Society circa 1955. Source: www.ebay.com/itm/154199939992

Vintage Swiss QSL card send by HB9OU to G3DOG confirming a 14 MHz CW QSO in July 1953. A USKA QSL stamp is afixed to cover Swiss QSL bureau fees. Public domain postcard (below threshold of creativity)

Amateur radio QSL card sent by Olle Hangerbrant, operator of UN Club Station SV5UN in Rhodes, Greece, confirming a 14 MHz CW contact with SM5YG (1950).

Cover posted at the Royal Train Railway Post Office (R.P.O.) carrying King George VI during his 1939 USA visit. Franked with a 3¢ 1939 stamp. Cachet by N.B. Scatchard, Box 326, West Chester, PA, USA, no copyright notice.

GREECE: Occupation stamp ("ΛΗΜΝΟΣ" overprint on 1911 recess printng definitive) issued in 1912 for Lemnos Island, block of 4 3 lepta stamps cancelled with Type V postmark "ΛΗΜΝΟΣ 28 ΟΚΤ (19)12".

Belle Époque beauty Mata Hari (Margaretha Geertruida MacLeod, 1876-1917), 1910. Wikimedia Commons file: commons.wikimedia.org/wiki/File:Mata-Hari_1910.jpg

United States of the Ionian Islands (Ionian State) postage stamp, portrait of Queen Victoria with greek text "ΙΟΝΙΚΟΝ ΚΡΑΤΟΣ", imperforated. Orange, no value indicated, sold for 1/2 d.

PNG rendering of SVG file created by Gigillo83 and uploaded on Wikimedia Commons under a CC-BY-SA-4.0 free license. Utility image for my collection. Wikimedia Commons file: commons.wikimedia.org/wiki/File:MK_road_sign_244.svg This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

SX-ECI, a Cessna 750 Citation X (cn 750-0262) of the Civil Aviation Authority of Greece at Athens International Airport/LGAV. (DSCN0638). This work is licensed under a Creative Commons Attribution 4.0 International License .