Yea, that's it a comet 26. It came with a locked up 5hp briggs. I put a 9hp briggs on it, a lil clearance issue on the head side, nothing a angle grinder couldnt fix. With the gear ratio, pulley sizes, and only a 26"cut that 9hp turned it into a lil bush hog.
I built my youngest son a old snapper, not as old as the Comet, I say late 80's early 90's. It don't have the spring under the seat, has plastic handle bars, and gas tank is mounted right behind the seat. It came with 8hp briggs w/ 30" cut. I put a electric start 13hp briggs on it. It's a really good lil mower. It leaves a very nice, dam near perfect cut.