Once more into the breach
Changing the 84 to 16468 in the serout2 command does make the display at least readable. However, the display appears to be in hex format as the numbers count up through A1, A2 and so on. I haven't thoroughly re-examined the manual for the hundredth time but I thought including the HEX command would change the numbers back to the standard convention. I will re-read that section on serout2 as my manual now falls open to that part. Thanks so much for your input so far. The command I now use is
serout2 PORTB.6,16468,[hex2 hh,":",hex2 mm,":",hex2 ss]
If you have any further thoughts on how to make this work I would be most interested if you would share them.
Again, thanks for interest in helping me.