Starrett 73 Yankee Machinist 4" Inside Caliper Spring Type & Screw Nut D661

Description

Note: D-241 is my inventory # only.
Here is a
used pair of vintage Starrett No. 73 INSIDE calipers in the handy 4" size.
(The new Starrett # is 73A-4). They are the spring-type with a solid-type screw nut.  They work great and can measure the full 4" size range.   They are in good condition with no owner engravings on them, just some normal usage marks. These run in the 4", 73A-4 size if new today from Starrett.
Here are some specifications on this type of caliper:
Starrett 73 Series "Yankee" Spring-Type Inside Calipers with Flat Legs and Quick-Spring Nut are made from a high-grade steel and well-finished. The legs are made of flat stock and are very durable. Calipers feature a hardened fulcrum stud, strong and flexible bow string, and centrally located leg adjustment to assure smooth action.
Features:
Starrett Yankee Calipers and Dividers are made from a high-grade steel and well-finished
The bow spring, although flexible, is exceedingly strong to assure reliability
Fulcrum stud is hardened and has a smooth bearing surface
The legs are made of flat stock and are very durable
The threads of the nut firmly engage the screw at the slightest pressure from the leg
Specifications:
Type: Inside
Size and Approximate Capacity (in): 4"
Size and Approximate Capacity (mm): 100mm
Joint Type: Spring-Type
Leg Style: Flat Leg
Nut Style: Solid Nut
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