What Version and Electronic File Type of the Shipping Services File file does MailStream Plus produce

MailStream Plus (MSP) generates the 1.6 version.
The version is shown in the Shipping Services File (SSF) 1.6 Header record positions 075-077 as '016'.  

The Electronic File Type is Header record position 003.  MSP only produces type '2', "Tracking File - used for USPS Tracking/Signature Confirmation and other extra services or Scan Base Payment File." 

This is as of November 2017.
For further information see USPS "Publication 199: Intelligent Mail Package Barcode"
UPDATED:  November 10, 2017