Vintage AGI 511A Preamplifier Excellent Condition

Description

Vintage AGI 511A preamplifier.
Apparently AGI never labeled the A version as 511A on the front and back of the preamp, they left the labeling as 511. I have the original outer box (the packing inserts are missing) which is in poor condition and it shows that this is a 511A model. I'm including a photo of the end of the original box to show that model number.
In excellent condition. Virtually no blemishes on the case and front panel, cosmetics have not been touched up. Front panel labeling is undamaged. See photos which show all sides of the preamplifier. The green flags that drop down inside the front buttons work correctly (flipping completely into position). Power cord is in good condition, insulation is flexible.
Functionally the preamp has not been refurbished, it is in it's original unmodified condition. I listened to the preamp using the tuner, phono and aux. inputs. The sound, to me, is excellent with all inputs. Hum and ambient noise are at very low levels. The volume and balance controls are silent when turned (I didn't clean any of the controls). The input switches work silently and correctly. I didn't see any functional issue or cosmetic issue.
The preamp will be double boxed for shipment.
Purchase with confidence, the preamp may be returned within 30 days for a full refund (including all shipping charges) if you are not completely satisfied.
See my ebay seller feedback comments which show the accuracy of my descriptions and my care in packaging.