Thanks Tom, Mark, and John. I will contact Richmond Woodturners.
Today I used @wtnhighlander method of moist heat to loosen both cross members under one of the side chairs. Basically, used old rag towels, moistened, and heated in the microwave in a pyrex glass bowl. I wrapped a hot rag around each of the tenon/joint areas. Took 15-20 minutes for each cross member, but eventually the glue loosened up enough for me to turn the x-member. Front legs came apart enough to remove Sheltie's chew toy. If anyone can date the chairs by logo or pdtn/part/model # 11651910, pic of logo on chair