You will need to include the model number of your Winchester to get a answer.
If it is a Winchester Model 94, made in 1981.
Date of manufacture was 1923
According to OldGuns.net, the year of manufacture for serial number 76526 is 1900.
You will have to contact the Cody Firearms Museum to find out.
The G prefix started at serial number 941,000 please look and see if you omitted one number from your serial number so a answer can be given.
Your question has used the serial number of your Winchester,not the Model number.Please include a description of your Winchester along with the model number,and the serial number to get a answer about your Winchester.
I would have to have your Winchester model number along with the serial number to answer your question correctly.
With the serial number that you provided your winchester model 1897 shotgun was made by winchester in 1913.
Your winchester model 1894 rifle was made by winchester in 1973 with the serial number that you provided.
Your winchester model 9422 was made by winchester in 1975 with the serial number that you provided.
Your Winchester model 1873 rifle was made by Winchester in 1904,with the serial number that you provided.