for me the helmet and the leather Inlet looks good,which markers are inside?
For the decal, lets look the experts.
No marks in the shell? That is not possible, please have a look in the helmet interior edge......
Look under the rear lip of the shell for a 3 or 4 digit code and then look under the lip close to where the left ear would be for an alpha-numeric code. Both codes should be stamped into the metal but may be hard to see if the stamping was done lightly or the helmet has been repainted or has rust etc.
Ok Glenn and Nikolaus, this weekend or next, I look good, I have it in a cottage.