npub13ruqn3wt7y3kwssdfdwfgt9fuy8p4ge4tf3quxg8hwvnlyjc57wq0t67kn (npub13ru…67kn)
Well you could take the seeds from this tomato itself if its a heirloom variety(which is the case)
Put them in a small jar with water, let sit for 3-4 days to get off the jelly part, then dry them on some paper towel and store em away in a paper bag when dry. Tomato seeds typically are germinable for at least 5 years.