Here we have a WW2 Aristo British Royal Naval Issue, Admiralty Pattern 300 pocket watch. It has the white enamel dial with the clear railroad track and Roman numeral hour markers. The sub-second register is at 6 O'clock with the thermally blued sub-second hand. It has the thermally blued spade and whip style hands indicating the time and is signed Aristo below 12 O'clock. The dial is protected by the thick original glass with the bevelled edge. The bezel has the coin edge to the screw front, with matching screwback. It is marked with the large broad arrow and the Admiralty pattern 300 signing. Inside it has the serial number 33441 and is marked as ‘Pure nickel’ and ‘Swiss Made’. It has a good quality Swiss Lever 15 jewel manual wind movement which is keeping accurate time.
 
Issued to petty officers during WW2. What the watches main use for, is not entirely clear. It is stated by some that they were used for timing torpedo’s and for wireless transmission officers.
 
Aristo were founded by watchmaker Julius Epple in 1907, in Pforzheim, southwestern Germany. It is a beautiful city which earned the nickname “Goldstadt” or “Golden City” for its jewellery and watchmaking industry. 
 
Please see the images as these compliment and aid the description provided below.
A further condition report is below.
 
Dial: 
The dial is enamel and is in decent original condition. It has good and clear railroad track, roman numerals and signing. There are some slight chips around the sub-second pinion. It has areas of discolouration.
 
Hands: 
The hands are original. They are of spade and whip style with a thermally blued finish. The blued finish is in good condition, with a bright shine. There is no bending to the hands.
 
Glass: 
The glass is original with the bevelled edge. Some marking and scratching associated with age.
 
Loop:
The crown, stem and loop are original and are in decent condition with light marking.
 
Case:
It is an open face pocket watch, formed of nickel. It has the coin edge screw on front and rear. The coin edge is in good condition, and it screws down well, with a good thread. It has light surface scratching associated with age. 
 
Caseback:
The screw back is in good condition. It has a coin edge finish which is in good condition. The Admiralty broad arrow engraving is good and clear. The thread is good and it screws down well. It has light surface scratching associated with age.
 
Movement:
The movement is a good quality 15 jewel Swiss lever movement, which is manual wind. 
 
The service history is unknown, but the movement is functioning well. It keeps time to within +30 seconds a day, with an amplitude of 335 and a beat error of 0.0m/s.
 
Case dimensions: 
Case width: 53.5mm 
Case length: 53.5mm 
Case length with crown: 66mm 
Case length with crown loop: 73mm 
Case Depth: 16.75mm