All About Pocket Knives

I just picked these 4 fight'n roosters up this weekend. I have handled a lot of roosters but these are the 1st ones I have that are stamped FRANK BUSTER CUTLERY CO Sheffield England. I have done some research and know that some display knives were made in Sheffield at a DIGBY factory and that the file work was apparently done at that factory.
My questions are since these are only 4 5/8" closed could they be considered display knives. Are they Daddy Barlows? They are serial#d 10 thru 13. The fit and finish is superb even for roosters. Any idea how many were made. I can not find them in the Fight'n Rooster book written by Parker.
Thanks for any help or opinions.

Tom

Beautiful knives. I think the Frank Buster knives were imported through the The House of Coutel. This and Digby's were trade names rather than factories. The knives were made by Graham Clayton.

I think you've got some really rare FR display knives there Tom. I'm sorry I don't know how many were made either. You talk about detail though,,,,WOW!

Thanks for the info, guys. It is much appreciated.

Tom

Those are some sweet knives!