Which version of Bottesini Concerto 2 in b minor?

The Opus 3 recording with Thorvald Fredin, double bass, is quite good: Opus 3, 8522.
http://www.opus3records.com/class_orch.html#8522
.

Thanks Rushton! I just ordered it.

Giovanni Bottesini (1821-1889) was a composer, conductor, and player whose instrument was the double bass. He's just about the only composer who wrote a significant amount of music for that instrument, so he is the patron saint and favorite composer of bass players! You can find a worthwhile critical discussion/evaluation of different recorded performances of his works in Third Ear: Classical Music: The Listener's Companion, ed. Alexander J. Morin, 2002, 1201 pages, an excellent, surprisingly comprehensive guide to recorded classical music that avoids the pro-British bias and chauvinism of the Penguin Guide and the Gramophone Guide.