I'm curious also so I'll restate the question.
There's definitely some typos on this description because the numbers are inconsistent with each other. Is the secondary 10k, 50k, or 60k? The description says all three in various places (in bold). ratio = sqrt(sec/pri)
From the website:
UTM2572
This is 1:10 or 1:20 mic or line input, high ratio, 150/600:10k, transformer. Recommended for vintage Telefunken V72 circuits. Also suitable as a high-ratio input transformer with high level capability for tube mic preamps.
Ratio: 1:10, 1:20
Impedance: 150/600:50k