B&W negatives...what do I have?

[MRickenbrode]

I came across some older film negatives probably from the middle to late 40's. The negative measures 4 1/2 x 2 3/4 roughly. Single negatives not in a strip or roll. What format of film is this?

Thanks for all of your help!

 

[dxqcanada]

Could be 116/616 format.
Old Film and Camera Formats

 

[webestang64]

Here is another guide..... Film format - Wikipedia