Okla. Stat. tit. 21, § 1710

If the thing stolen is any ticket, or other paper or writing entitling or purporting to entitle the holder or proprietor thereof to a passage upon any railroad, or in any vessel or other public conveyance, the price at which tickets entitling a person to a like passage are usually sold by the proprietors of such conveyance shall be deemed the value of such ticket.