WHAT Ampeg is this

[Five String]

Does anyone know what amp went in this combo speaker? Power rating, year manufactured, name of the amp, anything so I can go comb the internet and find out what it was. Thanks.

[Mola Ram]

I believe that is my first "real" amp that I ever used: the Ampeg B3-158. One 15 and an 8.

Served me well for years before my needs out grew what it could put out.

Wattage 150 RMS (Biamped - 100 for lows, 50 for highs)
Speaker(s) 15" and 8"
Controls: Push button input pad; knobs for gain, drive, bass, mid, treble, master volume, and balance; sliders for graphic EQ; push/pull switch on master volume to defeat/engage graphic EQ; push buttons for XLR direct out pad and pre- or post-EQ send
Other Side dish handles; top strap handle; kick-back casters; LED's for peak, EQ on, high limit, low limit, and power on

[Five String]

I think that's it. Thanks so much.