Antique Lador Music Box Table

I have two Lador music box tables.  Both are in wonderful shape and in working condition.  One of them has a key.  The other does not.  I am unfamiliar with the tune that each play.  They  measure approx 15-3/4" wide x 12-7/8" deep x 17-3/4 high  One is black with decor inlaid.  The other is a light  olive green with decor inlaid.   They are from Italy.  I have no clue how old they are as they were my husbands great aunts.  Sorry for the lack of information, but I'm just trying to get an idea of the time period and value.  Thanks!

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