This is the bottom of a Canadian beer bottle that I found off shore of Whidbey Island WA. I have researched the company, Silver Springs Brewery of Victoria B.C. and it was in business from 1905 to 1929. My question is about the number on the bottom. I have read where the Canadian bottlers didn't use emblems but would use a number. I have found other various bottles with similar numbers. Most of the bottles appear to be from 1900 to the 1930's. I suspect this is an area that the bottles are from the Prohibition era where Whidbey Island was an active smuggling site. Can someone give me more information on bottles marked with a single number only. Also the suction mark on the bottom is typical of many of the bottles. Is this an indication of a bottle mold process that can help me identify the age of bottles. Your assistance is greatly appreciated.