I think that Lr37158 is a certification. Yours is not a 465B based on the picture. Does it say how fast it is ? (20MHz, 40MHz, 100MHz, 200MHz, etc) Tek made a lot of different models.
Dave
Not sure, It may only be 20MHz. That's what It has written next to Vert Mode anyhow. That's the only mention of MHz besides next the power in that plugs into the back.
Greg