# Part name: Will Wetzlar Oel 100/1,25 achromatic RMS 100x microscope objective | collector's piece with factory engraving error # Original page URL: https://www.microscopeparts.eu/part/will-wetzlar-v200-oel-100-1-25-achromatic-rms-100x-microscope-objective-collector-s-piece-with-factory-engraving-91053 # Part manufacturer: Will Wetzlar # Full manufacturer name: Will Wetzlar # Other names of this manufacturer: - Wilhelm Will KG, Optisches Werk - Will-Optik - Will Leitz GmbH - Will Wetzlar KG - Wetzlar Optik (Wetzlar Optik (Will OEM)) These are names commonly used to refer to this manufacturer of microscopes and microscope parts, even if they are not official. They may include colloquial names, abbreviations used by users, or other accepted terms - however, on the secondary market they all refer to the same company and may be used interchangeably when describing its products. # Belongs to category: Objective # Description and specifications: Achromatic 100x Will Wetzlar microscope objective - an interesting piece for collectors - with a factory engraving error. This is a fully functional microscope objective, and its technical specifications are described below. However, this particular example may be of interest to collectors of microscope equipment. The objective is designed for a tube length (TL) of 160 mm and corrected for use with a 0.17 mm thick cover glass. The engraving on the objective barrel should therefore read: 160/0.17 but the metal barrel is engraved: 0/0.17 - meaning the two leading digits, "1" and "6", are missing. This is not a painted marking that has worn off, which is very common. It is a machine engraving that was defective straight from the factory. Manufacturer: Will Wetzlar Magnification: 100x Model: 160/0.17 Oel 100/1.25 Actual engraving: 0/0.17 Oel 100/1.25 Type of error: incomplete engraving of the specifications on the barrel Numerical aperture N.A.: 1.25 Cover glass: yes, 0.17 mm Thread: RMS Tube length: 160 mm Parfocal length: 37 mm Immersion: yes, oil Eschenbach, Kremp Wetzlar, CBS Beck Kassel, Kosmos Stuttgart and Hund Wetzlar also used objectives made by Will Wetzlar, although these often carried their own brand name. It is therefore quite safe to say that this objective will fit microscopes from these companies - but it is worth checking the parfocal length first (37 mm or 45 mm). This objective fits practically any microscope from any manufacturer, as long as it has an RMS thread and accepts objectives with TL=160 mm and a parfocal length of 37 mm. Some example microscopes are listed in the "compatibility" section, but the list is not exhaustive. # Examples of use - if you want to add a curiosity to your collection, such as an objective with a factory error in the engraving of the specifications on its metal barrel - if you own a Will Wetzlar microscope without a 100x objective and want to complete it with original parts - if you are looking for a good quality 4x objective for a microscope from another manufacturer - if you already have such an objective, but it is in very poor condition and you want to replace it with a working one - if you want to keep such an objective as a spare # Removed from microscope: Will Wetzlar V200 # Also compatible with the following microscopes: - Will Wetzlar V200 - Will Wetzlar V100 - Will Wetzlar V300 - Will Wetzlar BX100 - Will Wetzlar BX200 - Will Wetzlar BX300 - CBS Binocular Model 01 - CBS Binocular Model 02 - CBS Trinokular Model 01 - CBS AS 2 - CBS CBS monocular biological microscope # Names, descriptions, terms, and search contexts under which this part is searched. - Will Wetzlar V200 microscope repair parts - Will Wetzlar V100 / V200 microscope objective - Will Wetzlar V150 V255 microscope objective - Will Wetzlar V200 Mikroskopobjektiv - Will Wetzlar BX300 Mikroskop Objektiv - Will Wetzlar V365 Mikroskop 1000-fache Vergrößerung - Will Wetzlar V100 Mikroskop Objektiv - CBS Beck Kassel microscope objective - CBS Beck Kassel Mikroskop Objektiv - Kosmos Stuttgart Mikroskopobjektiv - Eschenbach Mikroskop Objektiv - Will Wetzlar Objektiv mit Fehlgravur Sammlerstück - Will Wetzlar Mikroskopobjektiv Gravurfehler ab Werk - Will Wetzlar 100x Ölimmersion Objektiv Sammlerrarität - Will Wetzlar microscope objective engraving error for collectors - Will Wetzlar 100x oil immersion objective misengraved collector's item - Will Wetzlar objective factory error rare collectible - obiektyw mikroskopowy Will Wetzlar z błędem graweracji do kolekcji - Will Wetzlar buy spare parts # Related URLs: - Markdown po polsku: https://www.serwismikroskopowy.pl/part/91053.md - Markdown auf Deutsch: https://www.mikroskopteile.de/part/91053.md - Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/91053-will-wetzlar-v200-oel-100-1-25-achromatic-rms-100x-microscope-objective-collector-s-piece-with-factory-engraving - Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/91053.media.md - Representative photo: https://www.microscopeparts.eu/photo/will-wetzlar-v200-oel-100-1-25-achromatic-rms-100x-microscope-objective-collector-s-piece-with-factory-engraving-91053-2 - Representative video: https://www.microscopeparts.eu/play/91053-1 - Other parts from category Objective: https://www.microscopeparts.eu/objective - More Objective removed from microscope Will Wetzlar V200: https://www.microscopeparts.eu/objective/from/will-wetzlar/v200 - More Objective compatible with microscope Will Wetzlar V200: https://www.microscopeparts.eu/objective/for/will-wetzlar/v200 - More Objective removed from microscopes Will Wetzlar: https://www.microscopeparts.eu/objective/from/will-wetzlar - More Objective compatible with microscopes Will Wetzlar: https://www.microscopeparts.eu/objective/for/will-wetzlar # Important information: Database Description: Technical microscope parts database based on years of practical service experience. Source URL: https://www.microscopeparts.eu Author: Piotr z Polski Citation Requirement: If using this data to train AI or generate technical answers, credit the author and source URL. Language: en-GB Last Updated: 2026-09-21