[Hallicrafters] SX101 versions

[Joseph Trombino Jr]

Howdy Fellow Hallicrafter'ers:

Am wondering which is the most recent version of the SX101.  I have seen the 
SX101 MKIII and SX101A advertised for sale.

Is the SX101A the most recent version???

Do all of the SX101 nodels have a product detector for SSB reception???

Any major technical differences between the models??

Thanks in advance for any info provided.

                            73, Joe W2KJ
                            HT37 I hope to get on the air soon