Serial NO. 51112712
Inside the lens is keeping very clear with no outstanding dust.
The reason why the condition is "A-" because Lens hood part has minor scuff marks.
We confirmed Auto Focus and Diaphragm work properly by mounting lens on camera.
See more detail Condition：A-(Mint) Sigma A Art 50mm f/1.4 DC 【 Free Shipping ! 】 Shipping ! ⇒Jump to Japanese Website.