Hi Chris ,
Many Thanks! Yes, this mobile phone must have been one of the first. I found it on Ebay.com and this was the first time ever that I 've seen a bag phone from Modar Communications Inc.
The complete story of the bag phones I unfortunately do not know, as Motorola unfortunately does not offer complete list of mobile phones produced by them .
I believe that the first bag phones have come in 1990 to the market.
Cheers
Thomas