Is it right that the initials O.K ( # all right ) didn't exist in old western novels/movies?

"Tombstone" is a theatrical movie about a historical event. The phrase "OK" came into use with the advent of the telegraph. The letters "O" dash-dash-dash followed by the letter "K" dash-dot-dash came to mean a shortcut for agreement or "I understand". The telegraph had been in use since the Civil War 20 years before the famous gun fight at the "OK Coral". OK was a common phrase by 1881.

The red waistbands were theatrical gimmics used in the movie so the audience could tell who the 'cowboys' were. The real 'cowboy' gang never wore red sashes and they were all readily known to the Earps and John Holiday.

The gun fight did not take place at the OK Coral or any other coral for that matter. It took place in a alley next to Fly's Photography Studio. The alley was only about 8 feet wide. No one really knows all the details of what really happened. The combatants were so engaged in the battle that their accounts of the event differ widely. Most of what is "known" of the event come from newspaper reports of the trial of the Earps and John Holiday. The newspapers were not unbiased. The Epitaph favored the Earps and Holiday. Another paper favored Sheriff Behan and the cowboys. No unbiased account of the events exist--makes for great storytelling in movie form.

My version: the whole thing was over a woman! Sheriff Behan has the 'hots' for a young actress from San Francisco named Josephine Marcus. He invited her to Tombstone to come live with him (without benefit of marriage). Josey was a real 'wild child' and accepted. However, she and Wyatt met and went absolutely 'nuts' over each other. This infuriated Behan so he put his dumber-than-dirt cowboy friends up to picking a fight with the Earps. Behan assumed that Wyatt would be killed or run out of town. That didn't happen.

Holiday, Virgil, and Morgan were wounded in the gunfight and 3 of the cowboys were killed. In the cowboy's revenge, Virgil and Morgan were both ambushed resulting in Virgil's death and Morgan losing the use of his arm. Wyatt and Doc Holiday, together with a small trusted posse went after the cowboys. Four or five of them were killed, the rest 'vanished'.

Wyatt abandoned his wife and took off with Josey. They were together for 47 years. Wyatt lived to be an old man in his 80s and died in the 1920s. Josey died in the 1940s. Wyatt was involved directly in as many as 30 gunfights. He never got as much as a scratch. Truly, one of the legands of the old west.

OK Corral was the name of the place. The OK was the initials of the owner as was customary in the early cattle days. Had nothing to do with "OK" meaning "Alright" or anything else. What if the owner was "Bob Johnson"? How would that sound to Hollywood? Wyatt Earp and Doc Holiday went down to the BJ corral and blew away their enemies.

...so then maybe it was really like the "Alright Coral", but the people in Oklahoma wanted their state,s initials to get into the story, and by the time the story got made into the movie everyone was just like all confused and stuff....

yes, O.K. Corral was a gunfight that has been portrayed in numerous Western films.