These were made in Spain for Malaysia. Note the pad and gloves for the heat and some of the recommended firing positions in fig.#7 & fig.#8.  The helmet worn in these photos is the M42/79 in use until Spain joined NATO in the 1980's. 
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These mortars are sold in the original box and complete with gloves, heat pad, cleaning rod, brushes and other tools. 
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Condition appears to have been excellent to new, however, handling marks are present and the de-milling was roughly performed, as shown.
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This is a very interesting item for collectors, we are currently selling SN# 250. The one pictured is the one you will receive.