Tom,
Based on the photo, it looks like it has the 1943 bridge modification. Also, with the anchor on the starboard side, it isn't a Portsmouth boat, which leaves EB or Manitowoc...and according to the info below, the sub in the photo was an EB submarine. Here is some info:
"Submarines built by EB or Manitowoc, WI, which also used the EB plans, had a slightly raised superstructure above the pressure hull tank tops as means of flood and draining the superstructure. The boats built by government yards or using government plans had a series of holes cut into the sides of the superstructure, which helped for a faster flood, and drain of the superstructure. Also another feature between the two types of boats are the position of the anchors. AS designed the boats were to have anchors mounted on both sides of the bow, but this was changed that only one anchor will be carried. The EB boats had the anchor on the starboard side while others had a port side anchor."
I think this would rule out the COBIA.
~ From: The Floating Drydock's Gato & Balao Class Submarine of World War Two Plan eBook
Mark