That's old school as heck man, plus 154.340 I believe for CSFD? I don't remember CSPD prior to their old Moto analog system.
I don't either. I do know that 154.415 is still in use (for station alerting?) and so is 155.940 (for the firefighters' Minotaurs). Up until the changeover, so was 155.415 (for some reason).
If I recall correctly, when I visited Brazos County 911 in 2003 and 2004 as part of my Police Explorers membership, they had a box filled with old CSPD/CSFD VHF mobiles in a storage closet that they had no idea what to do with. I forget what brand they exactly were, but I seem to remember GE.
I haven't checked if 154.340 is still in service, but I doubt it, though it was for a very long time after I started listening.
One thing I that sticks in my mind was how powerful 155.415 was. Back in the days when I had scanners that didn't do PL/DPL, I would get bleedover all over the place when that keyed up, even all the way up into the weather radio band. I only live about a mile or so from the tower that the repeater was on. When I was little, it even bled over onto some toy radios that my friends and I were playing with. Apparently, the toy radios must've been operating in the VHF band somewhere.
I originally listened on a vintage Lloyd's World Band Radio with VHF police band that I got at a local thrift store in 1999. Originally, I only really listened to the FM broadcast band so I could listen to a radio station I liked in Houston that I couldn't pick up on anything else. I would also occasionally listen to shortwave. It also had the VHF aeronautical band on it, but I could never pick up anything. After a while, I began straying more and more over to the police band and listening there. It wasn't until 2003 when my mom got me a PRO-94 for my birthday that I really started getting into the hobby.