Welcome to the Memo Club, my friend, a club where its members never forget anytrhing...
With the Memovox, you own a milestone in the watch history, a cult watch.
The E 853 is a superb reference: The same than a E 855, but without a date, housing, indeed, a Cal 815.
if you give us the movement number, we will date it for you.
As for the hands, go on the bay, there are quite a lot of hands for the Memo, for sale.
Un fuerte abrazo y sinceras felicidades, Amigo mio.
Nicolas