About 15 years ago I bought my Carvin LB75 bass and when it arrived and I opened the case I got a pleasant smell as well! I thought it was maybe the wax they used and loved it but the smell went away after a few months. I was talking to Carvin Customer Support much later and mentioned it and the guy said they put a drop of vanilla extract in the case before shipping. I tried it and it was close but it didn't last long (maybe I used artificial vanilla!). In hindsight maybe he was teasing me but that would sure explain the nice smell...
