The shape of the hull at the back end would suggest a D or A. If we could see the front properly,the machine gun aperture would confirm the mark.
The commander's cupola is an A. But some D's were retrofitted with it.
So I've been no help at all.
This one is just about done now. Need to glue in the stowage (and possibly add a bit more), then decals and weathering which should tone down the blue a bit. As @Sadurian said earlier it's a cracking little kit, which despite being 40 years old now, has really stood the test of time.