What type of render could this be

[oscarthorn]

Hello!
I have an old house (1920) that was plastered at some point. The walls are painted with lime paint. Now we are going to repaint and thought about fixing some small blemishes but I'm unsure about what type of plaster is on the house. I haven't been able to find any documents about this.

Does anyone have a guess or can give a hint?

Thanks!