In the years leading up to World War 2 the Netherlands East Indies started also making preparations. On of these was extending the amount of men that could be called to arms in the form of a reserve. The largest base for this were former (indigenous) men of the KNIL that had been honorably discharged.
To increase the visibility of the reserve a badge was introduced in November 1939. The badge was worn on the civilian clothing. A version of this badge is shown above. In 1941 the total reserve of former KNIL men amounted to 4700.
How many badges were actually made and handed out remains unclear but looking at the potential number of 4700 and only two years of use of the badge (1940/41) and the fact that the majority of these indigenous reservists became POW’s in 1942/1945 and most of these remained in Indonesia after WW2 it can be considered a rare badge now.
Other versions of reserve badges also exist for the Royal Legions Surakarta, Jogjakarta and Madura. These were introduced in 1940 and also intended for use on civilian clothes. The members of these legions were also part-time soldiers. These badges can be considered even rarer! So far I have found no pictures of these badges being worn. All these badges are in the same basic form of a shield with the Red/White/Blue flag on it and a weapon in the centre. They were only for wear on civilian clothes on the left breast.
Somewhat later the Home Guard (Landwacht) was introduced which existed of men not otherwise mobilized for different reasons. The basic badge has the word LANDWACHT at the bottom but versions for specific towns also exist. These amounted to a total of approximately 27.500 men.
Sources: B.C. Cats, ‘Hulpkorpsen in voormalig Nederlands-Indië, hun uniformering en onderscheidingstekenen’, in: Armamentaria 23 (1988).