Looks identical to the galvanized Mastercraft single-axle trailer under my Maristar, except for the guide posts. The front stop, actuator, winch, jack, brake lights, rollers, bunk boards, even what appear to be 6-bolt wheels (meaning the 5200 pound axle). The v-block appears to be spread wider than normal.
There appear to be holes in the correct location in the fender for the guide posts like I have, but this trailer has a different style of guide posts - probably better, because the ones on my trailer are always coming loose and needing to be tightened.
I'd say this trailer was for a Maristar 210 or an X-10 or similar boat.
1998 Maristar 200VRS