Vintage “Petrel” 25x–40x Zoom Monocular Telescope by N & B London – Extendable Spotting Scope

Description

This listing is for a vintage “Petrel” 25x–40x adjustable magnification monocular telescope, made by N & B Ltd London. This extendable spotting scope offers variable zoom and a classic lightweight design, ideal for collectors, hobbyists, and birdwatchers looking for a compact optical tool with character.

Key Features:

• Brand/Marking: “Petrel” ×25–×40, N & B Ltd London
• Magnification: Adjustable zoom from 25x to 40x
• Objective lens diameter: 37mm
• Construction: Metal body with textured grip
• Design: Three pull-out extendable tubes
  • The first tube is for magnification setting, with zoom scale markings from 25x to 40x
  • The 2nd and 3rd tubes are for image focusing
• Optics: Clear lenses; suitable for outdoor spotting
• Colour: Black textured finish
• Length: 32 cm (closed) to 72 cm (extended)
• Weight: 360 g
• Tripod mounting socket

Note: This telescope is in good overall vintage condition. The body shows some cosmetic wear and a few small paint chips (shown in photos). Optics / lenses intact (all lenses have been cleaned where accessible), producing a clear image. All tubes extends and retracts smoothly.

This is a well-made mid-20th-century monocular from a respected London maker, perfect for collectors of vintage field optics or anyone wanting a compact spotting scope with a classic design.