Coppersmith Guilds and Research for My Great Grandfather

[James Bayard]

I have been searching for a number of years for my great grandfather's birthplace and parents in Sweden.  His name in America was Otto William Bayerd, and although he served in the Navy in America, a signed affadavit from his wife indicated that he his previous occupation was as a coppersmith, the trade having been learned in Sweden.  Based on the information I have, he was born on 20 April 1862 in Stockholm, Sweden.  However, further research of the records in Stockholm has yielded no results for an Otto William Bayerd or an Otto William born on or around that date.  Further research in the Emigrant CD for Bayerd and Bayard as well as Otto William (Vilhelm, Wilhelm)who emigrated in 1880 (per records in the US) have also yielded no succesful result.  I am hoping if someone can tell me whether or not there are records for guilds of coppersmiths that may yield information based on a search for an Otto William (Vilhelm, Wilhelm) that was born in 1862 in Sweden.  As stated previously, I have numerous documents in his handwriting that indicate that he was born April 20, 1862 and that he emigrated in 1880.  Since I have been searching for more than a decade, I am desperate to find any clues.  Thank you in advance for your time and help.
 
Jim Bayard
Wareham, Massachusetts