Hi Jiri.... Thanks for your Assessment of various aspects of the Photo.
I've attached TENO Buttons of several sizes so that
you can see how they were constructed.(Seems to be the
standard type of TR Buttons manufacture?)
Yes, on other Photos of TENO Men in Luft Service, I have seen 'Luft' type buttons in use.
Narrow Collar Tab - Yes, it seems to be an Anomaly to me as well. Have not seen another one like it. So, I guess the Quartermaster Supply who was issuing Collar Tabs may have used whatever size / shape Laurel Leaf which they had in their supply. Txs, Dave/dblmed
