And it's a nice picture aviate, but not the original AH or DI. Coffman's pic has the authenic instruments. The AH shopuld be a Mk1B or Mk1E (Cof's pic in the latter). Although I can see the benfits of fitting a caging gyro. The Mk1s toppled quickly and then required 15 minutes to re-errect - which invariably meant a letdown on the T and S and the DI if aerobatting above cloud.