Really Right Stuff BH-55 with Lever-Lock Pan Clamp Filter Type_Close-Up The serial number is also

The serial number is also followed by a red engraved "Y"

Best for a flatter mirrorless camera or point-and-shoot

we've got you covered

and the 1988 F4 (although its label here is a duplicate of the F3's caption)

Really Right Stuff BH-55 with Lever-Lock Pan Clamp Filter Type_Close-Up The serial number is alsoReally Right Stuff's biggest ball head, the BH 55 is beautifully made and finished from high quality steel and aluminum, with a load capacity of 22kg. This BH 55 is in excellent cosmetic condition, with a few surface scuffs near its base. Ball lock is almost criminally effective, pan action on base and clamp is smooth. A fantastic large ball head suitable for nearly anything you might be able to throw at it. Base fitting is a standard 3 8" thread;