tag found in Spit 1500

[WLSServ@aol.com]

While looking the Spitfire 1500 yesterday, one of the interesting things I 
found was
a paper tag with the following:
       
                    round circle with a triangle inside with "FR" inside the 
triangle
                    below reads:  product from Gallow & Maddox Bros LTD
                                          Cambro Works
                                          School Lane
                                          Exhall
                                          COVENTRY

              Date: 14-9-78 (in ink)           Batch No.: 697 (in ink)
              Part No.:                               Signature:  L (looks 
like)

what part is this from?

Walt