Your short frame 7.65mm Luger with grip safety is of the 1906 style, but the "i" suffix serial indicates production or rework after 1919. So I would call it a M06/20 variation. These are discussed in Kenynon's "Lugers at Random" on page 180. These grip safety commericals were popular with the Swiss (see page 192) and other non-German customers (see page 198). Tom H.
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