Cast iron markings

[twtabb]

Picked this up today. Has a great seasoning finish. Trying to figure out the b maker. This is only mark I found.

 

[JustUs4All]

The mark on the botton may just be a ramdom mark made in casting and may not signify anything. The numeral 5 denotes the size of the pan. Not to worry though, many good old pans were not marked except for the size.

 

[twtabb]

Is there anyway to determine brand name?