www.925-1000.com

Its actually an old Lunt Silversmiths mark. The pattern could be Dorothy Q originally from 1883, but it is hard to tell from the photo.

Farmerboy

The second mark is an International Silver Company mark.

The mark is that of Sheridan Silver Company, Inc. of Taunton, MA. They incorporated in 1946 and mainly made silver plated holloware.

The J.S.Co. you mention is acutally I.S.Co. which stands for International Silver Company. The globe mark stands for the American Silver Company which is part of the International Silver Company. The name of the pattern is called Roanoke and was first made in 1913.

I believe your mark is that of Davis & Galt of Philadelphia. They were in business from approx. 1893 - 1922. I got this information from page 41 of Rainwater's Encyclopedia of American Silver Manufacturers. I do not know the pattern name.