The MBLE type 1955 is actually just a Heemaf type 1955, made for Philips. To circumvent import levees Philips had a number of their products by their subsiduary MBLE in Belgium. Also telephones that were made by Heemaf for Philips were made by MBLE.
MBLE, Manufacture Belge de Lampes Electriques, was a Belgian electronics firm with plants in different places. From 1925 the company for more and more involved with Philips and in 1981 it was completely absorbed by Philips.
MBLE made a few small changes to the original model. The strip with screw terminals was differently labeled, conforming to Belgian needs and standards. Also there was an extra capacitor in the dail. It also used a slightly different main capacitor that was on the base plate.
Produced by MBLE is a generous use of that term: most components have a Heemaf logo. Producing by MBLE in this case was little more than assembly of ready produced components shipped from the Netherlands.
The extrerior is almost identical to the original Heemaf version. The studs of the hookswich also have Philips logo. Only the MBLE logo at the rear, that for some reason was never applied straight, shows that is a Belgian version.
This model was exclusively produced for the Belgian market en you will be hard pressed to find one outside of Belgium.
Of course I just had to have this veriant of the Heemaf 1955. I bought my specimen from a Belgian lady together with an earlier Heemaf model, that was also made by MBLE. Her brother had worked for MBLE so she was also able to tell me something about the background story of this phone.