Type C - European ungrounded socket

2 round 4mm prongs (not earthed) spaced 19mm apart.

from wikipedia:

This two-prong plug is popularly known as the Europlug. The plug is non-earthed and has two round 4 mm (0.16 in) pins, which usually converge slightly towards their free ends. It can be inserted into any socket that accepts 4 mm round contacts spaced 19 mm (0.75 in) apart. It is described in CEE 7/16[12] and is also defined in Italian standard CEI 23-5 and Russian standard GOST 7396."

The Europlug is used in Class II applications throughout continental Europe (Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Greenland, Hungary, Iceland, Italy, Latvia, Lithuania, Macedonia, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and Ukraine). It is also used in the Middle East, most of Africa, South America (Argentina, Brazil, Chile, Uruguay, Peru, and Bolivia), Asia (Bangladesh, Indonesia and Pakistan) as well as the former Soviet republics, and many developing nations. It is also used alongside the BS 1363 in many nations, particularly former British colonies."

This plug is intended for use with devices that require 2.5 amps or less. Because it is unpolarised, it can be inserted in either direction into the socket, so live and neutral are connected at random."

The separation and length of the pins allow its safe insertion in most CEE 7/17, Type E (French), Type H (Israeli), CEE 7/4 (Schuko), CEE 7/7, Type J (Swiss), Type K (Danish) and Type L (Italian) outlets."

http://en.wikipedia.org/wiki/Europlug

photo from http://travel.webshots.com/photo/2193961660080281235GHWdcf