Zeiss Nettar 515 hood/filter size

[Nissin]

I received a Zeiss Nettar 515 as part of a cheap deal with a Mamiya-6 I wanted for parts. The camera seems to be in working order, but I need a hood and filters. I thought that a 27mm screw-in hood would work, but it was too small: 30 or 30.5mm is proably about right. Can anybody tell me the actual size? I've attached a shot of the camera for reference.
Thanks.
Nissin

 

[TheRook]

Oftentimes the camera's manual will give some clue about what accessory filters can be used; it's always the first place I look.
If you have difficulty finding the manual, you can read it here:
http://www.flickr.com/photos/diabolical_science/sets/72157616503712908/with/3424023058/

 

[Nissin]

Oftentimes the camera's manual will give some clue about what accessory filters can be used; it's always the first place I look.
If you have difficulty finding the manual, you can read it here:
http://www.flickr.com/photos/diabolical_science/sets/72157616503712908/with/3424023058/

Thanks for your suggestion and for searching out the manual. I actually found a copy of the manual on another website and, frustratingly, it doesn't indicate the size. I was hoping that someone might actually have either an original lens hood or filter, but since it's almost 80 years since the 515 was first manufactured, it might be a bit of a forlorn hope.
Thanks again for taking time to reply.

Nissin

 

[barzune]

The manual for my Zeiss Nettax 513/16 says that the 75mm Novar lens can be fitted with a 35.5mm screw-in filter. Your Nettar may be the same.

 

[AgX]

By the way, there are very cheap calipers on the market meanwhile, and they come handy for a variety of uses.