Similar lamps were used on newel posts in the first quarter of the 20th century.
From the chron.com
This will then connect to the newel posts to complete your wooden handrails.
From the yallsjoynt.com
A brass statuette lamp on the newel post introduces a grand kauri staircase.
From the nzherald.co.nz
For open landings, a newel may extend below the landing for a decorative newel drop.
From the en.wikipedia.org
Pine boughs and bundles of berries also make nice nosegays to hang on doors or newel posts.
From the chron.com
A staircase to upper bedrooms has beadboard paneling, cherry newel posts and step lighting.
From the freep.com
The prominent brass newel posts are topped with finials and connected by mahogany railings.
From the en.wikipedia.org
Next came the upright newel post at the bottom of the staircase.
From the post-gazette.com
Visually, it looks like half the newel is embedded in the wall.
From the en.wikipedia.org
More examples
Newel post: the post at the top or bottom of a flight of stairs; it supports the handrail
The central pillar of a circular staircase
A newel is the upright post which supports the handrail of a stair banister. In stairs having straight flights, it is the principal post at the foot of a staircase but can also be used for the intermediate posts, on landings, and at the top of a staircase.
(Newels) The larger support posts of the balustrade system. Usually located at the bottom and the top of the staircase and at turns or critical support areas of the balcony handrail.
(Newels) the posts or columns used at the turnings to connect the rails and stringers of adjacent flights.
A post to which the end of a stair railing or balustrade is fastened. Also, any post to which a railing or balustrade is fastened.
Tall ornamental post that supports the railing at the head or foot of a stair.
A vertical post used to start the balustrade, also used at points of vertical and directional transition. Newel posts are the backbone of balustrade strength.
Central or corner post of a staircase. A newel stair ascends round a central supporting newel; in Scotland called a turnpike stair.