P850

The Tektronix P850 is a 60 MHz ×10 probe for the 22X (222A, 222PS and 224) scopes only.

Tektronix P850
60 MHz ×10 Passive Probe Tektronix P850 Compatible with 224 Produced from (?) to (?) Manuals Tektronix P6015A, P400, and P850 Brief Description (PDF)

Manuals – Specifications – Links – Pictures

The reason it could only be used in such scopes is that it uses a very different connector to the widely used BNC connectors for other oscilloscope probes such as the (P6103).

Key Specifications

Attenuation	×10
Bandwidth	60 MHz
Probe input impedance	10 MΩ
Cable length	1m

Pictures

Tektronix P850