Noun
quote mark (plural quote marks)
(informal) A quotation mark; a quote.
Similarly, a single Geresh (U+05F3 in Unicode, and resembling a single quote mark) is appended after (to the left of) a single letter to indicate that the letter represents a number rather than a (one-letter) word. Source: Internet
There are no special marks to signify that the “count” is starting over with thousands, which can theoretically lead to ambiguity, although a single quote mark is sometimes used after the letter. Source: Internet
Which one of each pair is the opening quote mark and which is the closing quote varies between languages. Source: Internet