This envelope was a nice surprise in my mail box.
A car with a greeting, and in the window is an artistamp RayBunny for Guido Bondiolo.
Stampings and artistamps on the envelope front:
Lothar makes a nice A4 mail art piece
....full of fascinating stickers and markings
and the reverse side is stunning with blurred running colors and letters:
Thank you, dear Lothar,
'always good to see you in-the-mail!