How is Mr. Charrington different from other proles in 1984, and what do his differences suggest?

In Chapter 8 of Book 1, readers are told that, while it is quite late, Mr. Charrington’s antique shop is oddly still open, which gives the impression that Mr. Charrington is always available, no matter what time of day it is. The narrator describes him as about 60 and frail, with a benevolent nose and mild eyes, wearing glasses. His “gentle, fussy movements” give him “a vague air of intellectuality, as though he had been some kind of literary man, or perhaps a musician.” This description sets Mr. Charrington up as a generous character whose shop serves as a sort of safe house for Winston. This is all very different from the way other proles are described in the novel. Mr. Charrington seems kind and unassuming, friendly, and even helpful to Winston. His interest in old things symbolizes, for Winston, a hope for understanding the past and therefore having some control over the present. However, the fact that he is so different from the rest of the proles in the neighborhood, and so willing to interact with Winston, may raise suspicions in astute readers that Mr. Charrington is not all that he seems.