Some pictures of the assemblies for the transistorised reverb fitted to Italian-made AC30s, serial numbers in the 6000s and 30000s. The circuit stands in close relation to the one used by JMI and Thomas Organ in their respective solid state ranges - for JMI (and later, VSEL and VSL) the Virtuoso, Conqueror, Defiant and Supreme. The factory at Recanati in which the AC30s were made was a joint English, American, and Italian venture.

Serial number 30748.

Detail of the transistorised circuit in serial number 31082.

Above, two details of serial number 30989. The cartridge/transducer has a paper sticker with "150/AB" on it.

Serial number 30182. The spring assembly is stamped "8EB2C1B".