This is a rare example of a VP26 Rev A.2 that Jeff Steiger built himself, as evidenced by the serial # name badge on the side; he's confirmed this. Functions and measures as it should, matches the measurements of a later Rev B I have exactly. Date code on input transformer is from 2010. 2520 is a LAZ Pro LAZ2520 designed by Peter Purpose. $315 shipped/insured in US.