Pictures would help allot, but looking in my Griswold & Wagner Book 5th Edition I've found a
#8 738B Slant Logo, X Reinforcement. Value $125 pg 52
#8 738 Slant Logo Reinforcement Ring Iron $30 & Niclel $25 Page 52
Regular Griddle p/n 610 Block Logo #8 $40-$50 pg 53
Regular Griddle p/n 737 Slant Logo #8 $30 pg 53
Hope this helps. You could look on eBay and see what people are willing to pay...