Old Hollywood: Lewis sensationally revealed in her 1994 memoir that she was conceived in 1935 when Loretta Young, 22, and the married Clark Gable, 34, were shooting The Call of the Wild. Secret: Loretta Young is pictured with Judy Lewis in 1944, who did not know for years who her father was.
The sigma symbol provides the character used to denote the sum of an equation in mathematics. You can create a sigma sign by accessing the Character Palette, using a keyboard shortcut or by using the Special Characters menu in your current application.
By the mid 1970's (c1976) the headstock logo design changed to utilize a gold Martin style decal stating Sigma Guitars in script with Est. 1970 underneath in a smaller block font. The headstock shape was also modified, to be more deeply tapered and shaped to resemble their Martin brethren.hese rare, hard to find models were actually made in Japan and imported to, and guaranteed by Levin in Sweden. They cost more than the top of the range DR-41 at the time. They have a paper label stating Inspected and Guaranteed by Levin and Sigma Guitars est 1970 is inlaid on the headstock in abalone.