The affixing of a seal to a writing evidencing a contract for sale or an offer to buy or sell goods does not constitute the writing a sealed instrument and the law with respect to sealed instruments does not apply to such a contract or offer.

Oklahoma Code Comment

The distinction between sealed and unsealed instruments has been heretofore abolished in Oklahoma. 15 O.S. §139

Laws 1961, SB 36, p. 77, § 2-203.