Vintage Telefunken L 645 loudspeakers

I will apperciate any information about vintage Telefunken L 645 loudspeakers - value, sonic character, etc.
Looks like they were never imported to USA, so your pair (if in USA) 'probably' brought here by a serviceman from Germany..
Anyway, Google gives only German sites, and German eBay has some.
You'd have to check out some German sites to find any answers, unless some old dude who also brought some back happens to also be a member here. (very very low chances..)
No, they are not offered in the US.