I had a Framus hybrid. It had a heavy sprayed finish on it that crazed everywhere. Sort of an "orangish-goldish" color. Some sunburst toning going on, too, almost like a Fender sunburst. Not a rich look, in the case of my old one. My string length was 44 1/2 so you are getting off easy in terms of playability

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My bass was beat (finish missing, some edge sections gone up to the purfling, etc.). Mine was also not very loud or responsive. The top plate was quite thick, for starters.
I had Bill Merchant set it up (back when he was at Traeger's shop), so it played well. I usually used it amplified, so the acoustic challenges didn't bother me on the job.
The value of your loaner has a lot to do with condition, setup, and sound production. Maybe $1000-2000, tops, if it is mint (would be my guess...)