"100 Years of Mystery" Construction began in 1886 so this rare souvenir is most likely from the 1980s.
NOTE: this is NOT a full, regular sized coffee mug, it is a tiny collectible version aprx 3-4oz only (see pics)

Two (2) Vintage "Winchester Mystery House" Mini/Tiny Coffee Mug/ TeaCup Lot
White outer & interior
Design on one side only
2.625" tall, 6oz in weight
Marked on bottom: "Collector Mugs, Smith-Western Co Incorporated/ Tacoma Washington USA" (one has a 'Made In Korea' sticker?)

CONDITION: Vg, gently pre-owned and well maintained (most likely used for display only), has a few minor production fleabites/flaws under the glaze -including on the rim; has a nice 'ring' when you flick your finger against it/ no cracks, chips, crazing or utensil markings