Rhinocornyne humbolti and sinistral queen shell

[jkazan]

Does anyone knows how extrange this shell could be ? Are there some sinistral exemplairs of this shell? When was it first found or registred?  Does anyone knows about  the existance of a  sinistral queen shell (stombus gigas?)
wich other special caracteristics made a shell more singular as for exemple sinistral shells ? Is there a way for messuring how old shells can be ? How do you messure value of a shell.
This is for a screenplay not for any economical activity.
Please help me !