Pikatron audio Transformer UP 1644 M

Very good quality   transformers high/lo made by Pikatron in Germany.

These I found when I was breaking a Soundcraft 400B, they are not factory standard, and they was on the outputs of the mixer, I have no idea why they would be used. If anyone has any information, would love to know,

I am guessing these were/are serious money.

Some one had marked up input and output

Input measures 3.7 ohms , output 16.5 ohms