Tracy without seeing a pic it is hard to tell the age, there are many things that can roughly put a date to a saddle with a plus or minus 10 -15 years, the type of rigging, the seat style, the fork style, the cantle, the skirting and so on combine all these factors and you can roughly find the date to when the saddle was made,
also the stamping can be of help as you mensioned a basket weave, basket weave wasnt around or shall i say popular untill around the late 1880s 90s, so if you have a saddle with BW its going to be after the 1890s, like i said its a rough guide, Don