Late war British tanks - the Centurion turret is an attempt to modify a Mk 3 back into a Mk1/2 with ball-mounted polsten gun (20mm). The comets are the only ones I've been able to find in 15mm - all three are QRF models. Not too sure that I've got the green right - unfortunately the majority of the tanks I've taken the liberty of photographing in the flesh are in a reflective 'parade ground' green that evidently doesn't match the softer tones seen in the field.