Found it, but I'll wait to reveal til others have had a go.
Meanwhile...
View attachment 20128
It seems that the Spanish military now have this one in the El Goloso tank museum. This is another photo of the Verdeja SPG
One of the most successful programs was the attempt to produce a 75-millimeter self-propelled howitzer based on the chassis of the Verdeja 1 prototype. Beginning in 1945,now-Major Verdeja was ordered to begin designing this piece using a rapid-firing 75-millimeter L/40 howitzer designed by
Sociedad Española de Construcción Naval The availability of the required parts and the lack of complicated changes meant that the vehicle was quickly prepared and tested extensively. The fate of the self-propelled piece was much the same as that of the Verdeja 2, and the vehicle was left untouched at the proving grounds in Carabanchel until 1973, when it was moved to the Spanish base
Alfonso XIII, housing the then Mechanized Infantry Regiment
Wad Rass nº 55. It was soon moved to another base, and finally delivered to the base of
El Goloso, outside of Madrid, as a part of an armored vehicles museum.
Major changes to the original Verdeja 1 included removing the turret and replacing it with a gun shield with 10 millimetre thick steel armor. This meant that much of the chassis' roof and rear wall was eliminated. The howitzer was designed as a monoblock steel tube, using a double-baffle muzzle brake, with twelve twists completing a full turn every forty calibers. As mounted, the howitzer could fire between 0.5° and 25°, and move 4.5° either left or right. The crew could stow eight rounds of ammunition in a ready-round stowage area near the walls of the gun shield on each side of the breech, allowing easy access to projectiles. Otherwise, the vehicle could store another 24 rounds in an auxiliary carriage. The carriage was based on the axles and wheels of a PaK 36 anti-tank gun. A unique feature of this prototype was a mechanical brake built into the idler-wheel to the rear of the chassis, guaranteeing the vehicle's stability when firing and avoiding damage to the transmission.