Bolivia 1892 — Set of the 1892 unissued Railroad set Sofilpaz 43A-43G (I've never seen any of the top…

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Set of the 1892 unissued Railroad set Sofilpaz 43A-43G (I've never seen any of the top values so far). A forged Callas in green. A Mercury 2 Centavos unissued perf proof (see Akerman at the back). First time I have this one. Two extra Challas forgeries + a forgery on piece with oval "20 Centavos". Group of 7 Riester's 1864 essays in different colors including the violet with line watermarks and the later salmon on medium size paper (one faulty). Going into the best page of the collection. Starting with 5 Riester forgeries including one "used". Then, the most scarce right part of the Compound Die proof, see Ortiz Patiño lot 2071. Llama at right that fits perfectly with the first one of the 5 Riester's die proofs in different colors. A most scarce page!