When was my Coliseum 300 made?

[touchdown]

Hey all,

Just got this thing and ventured into the glory of Sunn amps (I've had a Sunn 1x18 for quite some time that I love, but I've been chasing after one of these amps for as long as I can remember.) Finally found the right deal and bought it up. It's wonderful; couldn't be happier with my tone.

Anyways, having trouble figuring out when it was made. The serial number is K77369. Here's a picture:



I think this is older than most Coliseum 300s that I've seen, as the logo is silver and not red/white. Let me know what you think.

[mckinnon audio]

  Hi there,I remember using one of those in the late 80's on a gig in Alaska,it looked good then,I figured it was a mid 80's amp,not sure though,I remember it sounded good though,Mel.