Sinar DB mount Copal #1 4x5 lens board

Sinar DB mount Copal #1 4x5 lens board
I am not a Sinar guy (at all), however I recently obtained this Sinar DB mount Lens Board with a lot of Toyo gear that I purchased.
I was able to confirm that a Copal #1 lens fits the front threads.
On the rear there is an armature that moves the 5-blade aperture and the movement seems smooth and has a spring return. Based on my measurements of the smallest aperture and assuming f45, the 3mm hole would imply that this board can be used for a 135mm lens.
Upon visual inspection, it looks fine, however I have no idea what a complete or incomplete setup would look like.
I had considered using this as a modified board to mount a medium format bayonette, considering the hole is pretty large and it seems as though a few screws removed would reveal just a plain board with approximately a 100 mm hole.
This Auction
This lens board seems to be in good condition and is sold as is and as shown in the photos. Feel free to ask any questions or request more photographs.
Payment & Shipping
Payment must be rendered by PayPal within 12 hours of auction end. Shipping will be provided via USPS Priority Mail, Domestic and International.
Please send a message for custom shipping options or if you should have any questions.
Returns
Returns are allowed for up to 14 days from receipt of the lens board.

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