Batboard

I have some cap codes that I need to find the freqs. for so I can program the tones into CDM-1550s. These are codes for our tornado sirens that need to be put in the radios at the EMA. The tones have been used for at least 20 years that I know of...I have never come across cap codes that look like this...maybe some one can help....

They are....7B69...B867...and...6F60...

Any help would be appreciated