To add to Ron's great info. posting :
(Click on the small photo to blow-up to a larger view...and then click on the expand button in the right-lower corner of the 2nd. photo view to get an even larger view...)
Photo is from V. Bobb'a book on Swiss lugers, from page 192.
<a href="http://forums.lugerforum.com/lfupload/triggertypes1001.jpg" target="_fullview"><img src="http://forums.lugerforum.com/lfupload/triggertypes1001.jpg" width="400" alt="Click for fullsize image" /></a>
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />