What makes a Double bass good for Jazz or Classical?

[Pongsak Sooksawak]

Originally Posted by Ken Smith

Ebony nail near the F holes? Can you show me a picture of that? This sounds confusing!

Ken
That is very difficult to capture the pic. But, that's not the nail. The position is not near the F holes.

Here, that's the same thing happened with the Hawkes and Son Concert Double Bass labelled and dated 1910 - #2644 from the contrabass shoppe, UK.

"The instrument has what we call “pins” - in the corners and at both top and bottom blocks. These were fitted to instruments - that were destined for use in tropical countries. In glue-softening high humidity's - the pins would help maintain the position of the table and back onto the blocks."

Sorry for my english to make you confuse.