Carr Skylark 1x12 Valve Combo 12 Watt w/Built in Attenuator.
Used, but in very good condition. This is collection only, due to the fragility of posting a valve amp. 
Happy to work with any buyer who wishes to arrange collection via a specialist and insured private courier such as Lenspeed. 
Full Carr bumph below:
The Carr Skylark is quite possibly the ultimate low-power American inspired guitar amplifier! It's their nod to the much loved smaller 60's amplifiers like the Fender Harvard. The guitar world has seen quite a resurgence in these lower wattage American voiced amps, not only because they sound great, but they deliver that saturated tube tone at manageable volumes.
The Carr Skylark also incorporates an extremely usable built in attenuator. When the attenuator is off, the amp supplies its full 12-watt output. When on, a control allows you to adjust between 0 to 1.2 watts. Why 1.2 watts? Trust us, 1.2 watts from this amp is louder than you might think. Typically, a 12 watt amp will provide cleans only at the lowest volumes. The Skylark delivers an impressive array of tones, including full, punchy cleans with a decent amount of headroom. As well, you can get a nice assortment of overdriven tones like blues, classic rock, and smooth, singing distorted leads.

Power Output: 12 Watts (built in switchable attenuator - (1.2 Watts down to Zero)Output Tubes: 2 x 6V6GT (cathode biased)Preamp Tubes: 2 x 12AX7, 2 x 12AT7Controls: Volume, Treble, Mid, Bass, Reverb, PresenceSwitches: Hi/Lo Gain, 12 Watt / 2 Watt, Power/Standby1x12 Dims & Weight: 21" Wide x 17 High x 9" Depth - 36 lbs1x12 Speaker Config:Celestion 12" A TypeAdditional: Lush, All-Tube driven Reverb!100% True point-to-point wiringSolen Aerospace Satellite power supply capacitorsCustom Carr power/output transformersCathode Biased (self-biasing)Dove-tailed cabinet constructionLocal made saddle leather handle