Enlarger lens board identification

I recently got a job lot that included 2 enlarger lenses mounted on circular lens boards. I thought these were Durst fit (they have the same chamfered disc design) but it seems they are smaller at just under 60mm diameter. Does anyone know which enlarger these would fit?

In case it's of use to others the enlarger boards I know of are:

78mm diameter with chamfered outer edge = Durst
84mm diameter with chamfered outer edge = LPL or Meopta
104mm diameter with 4 bayonet tabs = Fujimoto
114mm diameter with 2 cutouts = DeVere
4x4" square = Besser
73mm oval or circle with 2 screw slots = Omega
56mm diameter flange with 3 screws = Gnome

Thanks Mike

Vivitar VI is 100mm with 2 screw slots

Philips is also round with dual chamfered edge:

ic-racer said:

Philips is also round with dual chamfered edge:

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That may actually be an LPL board. Phillips may be a re-brand.

Great thought if there is compatibility, we should check it out. Do you have an LPL board to check? Here is the Philips:

ic-racer said:

Great thought if there is compatibility, we should check it out. Do you have an LPL board to check? Here is the Philips:


View attachment 348389View attachment 348388

Click to expand...

These match my LPL boards - used with the 7700 enlargers.
And KHB's site indicates the same part numbers for the LPL 4x5 enlargers
Their measure is the same as is in the OP's listing in post 1 for LPL enlargers.