Part of my ephemera collection:
2 x Tickets for the luncheon held 30 October 1937 in celebration of the opening of the Lewis Pass road.
"The Lewis Pass, at the southern end of the Spenser Mountains, leads from the Lewis River (a Waiau tributary) into the Maruia River (which flows into the Buller). The 863-m saddle was used by Māori, and crossed by Henry Lewis in the early 1860s. It was not an important route to the West Coast goldfields, but after the road (now State Highway 7) was built during the 1930s economic depression, it became the main route from Canterbury to Westport and Nelson."
John Wilson. 'Canterbury places - Hanmer and Lewis Pass', Te Ara - the Encyclopedia of New Zealand, updated 2-Mar-09