Unique Sterling Silver Invitation Medal / Plaque, dated 1917, for a "motor trip through the West".  Front reads  "Mr. Wesley McClean You Are Cordially Invited To Join Mr John W. McGraw & Mr. Jacob Myers M.D. To Accompany Me April 30, 1917, On A Motor Trip Through The West, Samuel Mineer."  The back of the Medal is Stamped "Sterling" with a small hallmark.  I have never seen anything else like it.  Custom made by a jeweler and only three could have been made, each of them unique.  Sterling Silver, over 11 ounces, 5" by 3 1/4" in size, excellent condition although cleaned previously.  This medal has been in my wife's silver oddities collection for over 40 years.