1900 US Lugers~
 

curious how that safety works

Simple
 

Squeezing your grip causes the little metal tag to depress allowing the thumb safety lever to release and fire. Simple and perfect!!

haha yes, very simple! Is there a cut-away anywhere? I like how the tap is opposite to the 'new' models

Some more Eagles~ http://www.landofborchardt.com/AEluger-article.html

Were all the test Lugers issued with left hand holsters and why?

Good Question??

From one of our own~ http://testluger.com/

THE TESTS~ http://testluger.com/?page_id=2

Although there have been a couple of right hand holsters reported, I have no knowledge of their authenticity. So essentially all the test Luger holsters were left hand...but they were intended to be worn on the right side butt forward. This was still in the day when swords were considered a weapon, so the sword and the pistol were both worn in a cross-draw fashion. In the style of the horse cavalry, the sword was drawn with the right hand and the pistol was drawn with the left hand.
Ron

And reigns to the horse would have been held between teeth.

The 1911 US Trials~https://www.americanrifleman.org/art...-of-the-m1911/

Trials~http://www.forgottenweapons.com/1907...volver-trials/

The Other Greatest~https://www.americanrifleman.org/art...-in-the-world/

Test Holster
 

Inside and out! Toggle and lever indents wear~