Thanks for all the encouraging replies!
The only change I would make: swap the silver collar for a black or white one (3rd pic). The combination of silver and gold buttons/embellishments is somewhat strange.
Yes, I've thought about that too, but then I'd need 60 of these black or white collars for this particular infantry-regiment...
I find it not that disturbing so I used all the silver collars I had and bought a few extra.
Maybe I could get hold of black ones (the regiment based on the blister-redcoat has them but I'm not gonna disassemble these soldiers)...
Never seen the collar in white, except in a recent set from 2010... from the Special Agents-theme if I'm not mistaking.
Do you perhaps have the ETN-number for the white collar?