This clearly did not come from the Titanic but probably from the Olympic or Brittanic. The emblem on the base seems to be a combination of a sun and the White Star logo. This is obviously a very nice piece of White Star memorabilia with interesting Titanic associations.
The starting price reflects this. Please contact for a quote. This is for sale without reserve. The item "NEGRETTI AND ZAMBRA MARINE BAROMETER WHITE STAR TITANIC" is in sale since Wednesday, October 11, 2017. This item is in the category "Antiques\Science/Medicine\Scientific Instruments".
The seller is "cmeredith1961" and is located in Stafford, Staffordshire. This item can be shipped worldwide.