Official website: ntm.cz (wikipedia)
Adress: Kostelní 42, 170 78 Prague 7 (google maps)
Entry fee: 190CZK (8 EUR), 90CZK (4 EUR) reduced (photo permission 100CZK, 4 EUR)
Opening hours: Tue-Fri 09:00-17:30, Sat-Sun 10:00-18:00
Opening days: Tue-Sun (Monday closed)
(information updated on July 2017)
Below are my photographs of aircrafts preserved:
NOREG | Bleriot XI | Private

4| LWF Model V Tractor | United States - US Army Air Force (USAAF)

NOREG | Etrich Sport Taube | Private

B9.9 (#108) | Avia BH-9 | Czech Republic - Air Force

11120 (#14) | Anatra Anasalj | Russia - Air Force

L-BILG (#1) | Simunek VBS-1 Kunkadlo | Private

119.15 (#15) | Knoller CII | Austria/Hungary - Army Air Service

OK-AVO (#14) | Avia BH-10 | Private

OK-TBZ (#1) | Zlin XIII | Private

OK-AHN (#118) | Mraz M-1C Sokol | Private

OK-IRF (#016) | Zlin 50LA | Private

TE565 (#CBAF.IX.11397) | Supermarine Spitfire LF.9E United Kingdom - Royal Air Force (RAF)

0107 (#230107) | Aero L-39C Albatros | Czech Republic - Air Force

RA-05 (#0002) | Aero HC-2 Heli Baby | Czech Republic - Air Force

OK-8340 | Racek 3 Mrkev | Private

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If you find any discrepancies in data or missing aircraft, please comment below.
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