1. Albert Pick & Co of Bridgeport, Connecticut manufactured plated silver flatware and holloware and may still be in business.
2. I doubt if you will find a website for the Sheets-Rockford Silver Plate Co. You may try contacting the Rockford Illinois Historical Society or Library to see if they might be able to help you on your research.
3. Crescent Silverware Mfg. Co. Inc. of Port Jarvis, New York moved from New York City to Port Jarvis in 1939. In 1977 they were acquired by Samuel Kirk & Son Inc. which is now The Kirk Stieff Co.