Thank you both for your responces
It appears that serial of this aircraft is another uncertainity.
While searching for any clues I've found a table which show both no 93 and no 94 as lost in very similar circumstances, the latter without a specified date. In fact it is the same incident that listed there as the cause of loss of no 93 and no 94 as there were no other crashes of Amiot 143 in Germany with the capture of the whole crew
https://www.passionair1940.fr/Armee%...toriques-2.htm
But only one aircraft was lost.
The place of the crash not near Mainz as stated but near Burgfarrnbach.