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Polished brass mortise entry lockset with screwless knobs, wide face plate, left-hand orientation

Marks USA

Marks USA New Yorker 7NY10A/3 Polished Brass Left Hand Mortise Entry Lock Set

SKU CH-K0J9-A4X3A

Left-hand mortise entry lockset with screwless, thru-bolted brass knobs and a solid brass cylinder

  • Lock keyingKeyed Different
  • Surface finishPolished Brass
  • Product typeMortise Lockset
  • Polished brass finish resists tarnish and adds classic style
  • Mortise lockset with 1" deadbolt delivers strong entry security
  • Scissor and anti-friction latches ensure smooth, reliable door operation
  • Screwless knobs thru-bolted simplify installation and maintain clean appearance
  • Solid brass cylinder with 2 keys provides durable keyed-different access

Polished Brass Mortise Entry Lock

The Marks USA New Yorker 7NY10A/3 is a left-hand mortise lockset finished in polished brass for entry doors. It uses a scissor latch and anti-friction latch with a 1-inch deadbolt throw. The wide front face plate measures 1-1/4 inches by 8 inches and fits a 2-3/4 inch backset. A solid brass cylinder operates by key outside and thumb turn inside.

Screwless Thru-Bolted Knobs

Knobs attach without visible screws through a thru-bolted design that clamps the lock body securely. The set includes a solid brass cylinder and two keys keyed different for immediate use. Solid brass plates on both sides resist wear and match the polished brass finish throughout.

Commercial Grade Build Quality

Constructed as a commercial mortise lockset with solid brass plates and cylinder for durability in high-traffic applications. The left-hand orientation determines lever or knob rotation and latch direction for proper installation. Wide face plate dimensions suit standard commercial door preparations without modification.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $177.99
Pricier than about 81% of the 2,145 comparable items (median $55.99).

Specifications

Product
Product typeMortise Lockset
Size & build
Surface finishPolished Brass
More details
Lock keyingKeyed Different

Questions about this item

How often should the scissor latch and anti-friction latch be lubricated?

Light lubrication with a dry PTFE spray once a year keeps the scissor latch and anti-friction latch operating smoothly and prevents binding.

What component reaches its limit first during continuous heavy traffic?

The solid brass cylinder and its key pins wear before the thru-bolted trim or the wide face plate under sustained daily use.

Does the lock generate noticeable heat or noise when the deadbolt cycles repeatedly?

The mechanical deadbolt and latch operate silently and produce no measurable heat during repeated cycling.

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