I have a Sony Beta L-125 ALIGNMENT TAPE KR5-1V. Honestly find the variations confusing and trying to determine if this specific one is of value/how to price it. It looks to be in pristine condition, though it is not sealed.
You’re better off going to a forum or website that deals in this type of media for a value.
If you have an issue with a Betamax player, feel free to ask on this forum.
In video terms, a Monoscope is a multi-purpose test signal. It usually combines color bars, multiburst, monochrome horizontal resolution, a grid for CRT alignment, plus other stuff. There is not one standard pattern.