Roadrelics..
To a die-hard Indian guy it is always MOTOCYCLE,, always was and will be to most Indian owners..set the marque apart then and STILL now..

My gut feeling is it is a made to order sign way back, the person paying picked the spelling.. and there may be more than one made (note made, not in existence)

My gut feeling is you are going to dick with this so long that it will be gone before they BRING IT SOMEWHERE for YOU to see it!

Bottom line, it is what it is, and bare minimum is worth at least what it cost to make it today.. or a lot more..

Ask your self if it is not real why would they base it on a not well known sign??