The Dutch heavy weapons image shows a Dutch Spandau M.08 which was called zMG M.25 in The Netherlands, the MG's were mostly confiscated from retreating German forces at the end of WWI and were kept in storage until 1925.
The MG is shown in an AAMG configuration, its main use in May 1940. It was no longer used by most MG companies.
It's a picture from a re-enactment group it seems.
Technically that means it's incorrect, as it shows an MG that was not used by most army units.
Regular army MG companies generally used the Dutch Schwarzlose M.08/15, which was also used in most bunkers:
On motorcycle side-cars, the Schwarzlose had by May 1940 generally been replaced by the Lewis M.20 light MG, as the weight of the Schwarzlose was an issue.
Reserve formation MG companies generally used the Vickers M.018:
All fired 7.92mm rounds, except non-reconfigured Vickers MG's which still fired 7.7mm rounds.