I got this set of six Chicago Specialty Mfg. Co sockets on Friday at an estate sale.  I've never found a set of this style of socket in a deep version. Five out of the six are stamped " Chicago Specialty Mfg. Co. Made in USA.

          1. 1 11/32 x 1 7/16.

          2. 1 5/32 x 29/32. Marked 451 with 2 diamonds.  No MFG markings.

          3. 1 1/32 x 1 9/32 .

          4. 1 1/32 x 29/32 . Welded and cracked.
         
          5. 1 1/32 x 31/32.

          6. No size marking. Marked Chicago Specialty Mfg. Co.

   I thought they were cool enough to get. Are they rare ??
               

     

What I think you have is a 5-piece set of Chicago Specialty Mfg. Co.Shower Valve Sockets and an old Mossberg socket. If you look closely at the 2 diamonds, you can see an "M" - the logo for Frank Mossberg...

When I look at the socket I can't see the  M . But , It's clear as all get out in the pic.