The Basics

This version of the Arnold & Son classic HMS1 has a 40mm stainless steel case and a NAC-treated version of caliber 1001. Blued screws in the rhodium-plated movement, mirror-polished screws in the NAC grey version, and specific decorations for each version testify to the attention to detail. The HMS1 collection comes in a range of dial colours and with various finishes depending on the model, as well as a choice of cases in 18-carat white gold, 18-carat rose gold or stainless steel. It is also available with an exquisite diamond-set bezel.

Brand: Arnold & Son
Family: Royal Collection
Reference: 1LCAS.S01A.C111S
Name: HMS1
Produced: N/A
Limited: Yes, 250 units

Below is a detailed look at Arnold & Son’s model 1LCAS.S01A.C111S from Royal Collection watch family, including the price, case details and movement features.

Arnold & Son Royal Collection 1LCAS.S01A.C111S

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The Details

Arnold & Son’s HMS1 (1LCAS.S01A.C111S) was originally released in N/A. This watch features a hand-wound movement beating at a frequency of 21600 bph ( 3 Hz) to provide a 90-hour power reserve when fully wound.

The Case

The stainless steel case measures 40mm in diameter and roughly mm thick. The round case is paired with a silver color dial with -shaped hands, and a stick / dot hour markers and minute track, covered by a sapphire glass. Arnold & Son’s Royal Collection model 1LCAS.S01A.C111S is water resistant up to 30 meters (98 ft). A display caseback is over the back of the watch case.

Material: Stainless steel
Glass: Sapphire
Back: Display
Shape: Round
Diameter: 40mm
Height: mm
Lug Width: N/Amm
W/R: 30

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The Royal Collection 1LCAS.S01A.C111S movement is a powered by caliber A&S1001 NAC made by Arnold & Son. The 21-jewel hand-wound movement is 30mm in diameter. Its balance wheel oscillates at 21,600 semi-oscillations per hour or 3 Hz. This movement offers a 90-hour power reserve.

Type: Hand-Wound
Brand: Arnold & Son
Caliber: A&S1001 NAC
Base: Arnold & Son A&S1001
Display: Analog
Diameter: 30mm
Jewels: 21
Reserve: 90 hours
Frequency: 21600 bph
Time: Hours, Minutes, Small Seconds

The Price

How much does the Arnold & Son’s Royal Collection 1LCAS.S01A.C111S cost? This watch was introduced in N/A and has been in Arnold & Son’s collection for around . This watch is a limited edition with just 250 pieces released. As with most luxury watches, the price of depends on the availability and demand.

CURRENT PRICE: Not Available .

For more information, visit Arnold & Son online.


  • Brand: Arnold & Son
  • Model: HMS1
  • Reference Number: 1LCAS.S01A.C111S
  • Limited: Yes, 250 units

Case & Dial:

  • Material: Stainless steel
  • Glass: Sapphire
  • Back: Display
  • Diameter: 40
  • Thickness:
  • Lug Width: N/A
  • Dial Color: Silver
  • Indexes: Stick / Dot and -shaped hands
  • Water Resistance: 30 meters


  • Winding: Hand-Wound
  • Brand: Arnold & Son
  • Caliber: A&S1001 NAC
  • Display: Analog
  • Diameter: 30mm
  • Jewels: 21
  • Power Reserve: 90 hours
  • Frequency: 21600 bph
  • Functions: Hours, Minutes, Small Seconds

About Arnold & Son

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Arnold & Son is part of the Citizen group.

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