The serpentine (a curved lever with a clamp on the end) was held in firing position by a weak spring, and released by pressing a button, pulling a trigger, or even pulling a short string passing into the mechanism. The slow match held in the serpentine swung into a flash pan containing priming powder. The flash from the flash pan travelled through the touch hole igniting the main propellant charge of the gun. As the match was often extinguished after its relatively violent collision with the flash pan, this type fell out of favour with soldiers, but was often used in fine target weapons.
In Japan the first documented introduction of the matchlock which became known as the tanegashima was through the Portuguese in 1543. The tanegashima seems to have been based on examples of snap matchlocks purchased from Portuguese traders, and originally produced in the Portuguese armories present in Asia including Portuguese Malacca and Goa in Portuguese India, which were cities captured by the Portuguese in 1511 and 1510, respectively. The Malay arquebus, istinggar, ulitized this type of mechanism.
- The defences of Macau: forts, ships and weapons over 450 years Richard J. Garrett, Hong Kong University Press, 2010, ISBN 9789888028498 P.176
- European & American arms, c. 1100-1850, Author Claude Blair, Publisher B. T. Batsford, 1962, Original from Pennsylvania State University, Digitized Jun 30, 2009 P.42
- Tanegashima: the arrival of Europe in Japan, Olof G. Lidin, Nordic Institute of Asian Studies, NIAS Press, 2002 P.1-14
- The bewitched gun : the introduction of the firearm in the Far East by the Portuguese, by Rainer Daehnhardt 1994 P.26
- Tarling, Nicholas (1992). The Cambridge History of Southeast Asia: Volume 1, From Early Times to C.1800. Cambridge University Press. ISBN 9780521355056.
- Eaton, Richard M. (2013). Expanding Frontiers in South Asian and World History: Essays in Honour of John F. Richards. Cambridge: Cambridge University Press. ISBN 9781107034280.