Sorry- we need a model number. However, this is a link to some serial number data- http://www.ithacagun.com/pdfs/serialnumbers.pdf
The Ithaca side by side 12 gauge serial 188650 was made in 1927.
I would say that you have a Ithaca model flues double barrel shotgun that was made in the year 1923,with the serial number that you provided.
1947
1949
By your description,it sounds as if you have a Ithaca model Flues double barrel shotgun that with that serial number was produced in the year 1914.
There's a list of serial numbers by year at http://ithacagunrepair.com/page5/page23/
There's a list of serial numbers by year at http://ithacagunrepair.com/page5/page23/
Ithaca 12 ga. double barrel side lock hammers serial # 43300
There's a list of serial numbers by year at http://ithacagunrepair.com/page5/page23/
There's a list of serial numbers by year at http://ithacagunrepair.com/page5/page23/
the age of a 12 gauge Ithaca is : 47,000 years old .
It sounds to me that you have a Ithaca Flues model double barrel shotgun.With the serial number that you provided,your shotgun was made by Ithaca in 1917.