[Boatanchors] SX-100 Differences

[Byron Tatum]

Hello-
    Can anyone tell me these things regarding the Hallicrafters SX-100 versions:
        1. Is the version (Mk.I, Mk. II, etc.) stamped on the rear of the converter box?
        2. What are the differences between the first SX-100's and the later ones? Is this documented anywhere?
    I bought a decent cond. SX-100 today and I plan on going through it completely in near future cleaning, replacing capacitors or other parts as needed, and checking alignment. Are there any good websites or sources of information on woirking on the SX-100?
    This was my first decent receiver when I became a general class ham in late 60's. I regret ever selling the one I had then. I finally found a good replacement!
                                                            Thanks, Byron WA5THJ.