This is a Fender Pure Vintage '64 Telecaster bridge pickup in mint condition. These are stock in the American Vintage '64 Telecaster, American Original 60s Telecaster as well as other models like the George Harrison Rosewood Tele and have the period correct grey bottom bobbins and base plate. It has a reading around 6.2k. Mounting screws and rubber tubing included!

Note that I had a few so consider this a stock pic but is the same model, looks the same, etc.

Here's more info from Fender's website:

PURE VINTAGE PICKUP POWER From vintage bobbin construction to genuine original-era cloth wiring, all Fender Pure Vintage pickups are wound to precise specifications for authentic, traditional Fender tone and performance.

Warm up your Telecaster tone with a set of vintage-accurate early '60s single-coil Telecaster pickups, which offer hotter, stronger Tele twang that's crystal clear and versatile enough for any musical application. FEATURES
• Enamel-coated magnet wire delivers warm vintage-style tones
• Alnico 5 magnets add more focus and enhanced dynamics
• Staggered bridge pickup polepieces balance volume and output across every string
• Copper shielding plate on the bridge pickup produces a more lively tone
• Wax-potted
• Period-correct fiber bobbin construction