a original  [ post war? ]    vintage   Royal Navy    specialist rank trade patch 


educational  coder    branch   patch 


white type of canvas  patch  with blue print detail 

heel shaped measuring  11.2cm x 9.2cm   

with  makers  code    tab to right corner  reading " 33145 " 

 faint pencil writing on reverse  "  educational  coder 1954 "

 overall   in near mint  condition     

not a common patch
 
the text on revere might just refer to when the patch was given / awarded ?