Pyrex 75mm Ribbed Watch Glasses, 9990-75 Pyrex Watch Glasses


Thank you for viewing our Store,

We have for sale a partial box of Ten 9990-75 Pyrex watch glasses in original packaging. All appear to be new old stock with no evidence of use. The packaging and the paper have been generally undisturbed. We purchased from a long-established laboratory that was consolidating with another location.
Designed for use as a beaker cover. Ribs are molded into the glass. Allows reflux of digestate and escape of excess vapor. Meets EPA requirements for methods 3005, 3010, and 3020.

Marked: Pyrex ENGLAND.
Measures: watch glasses: 75 mm diameter; box : 6” x 6” x 5.5”
Condition: The watch glasses are in new condition. Please see all photos as they are part of the description. No visible chips, discoloration or cracks. Box has minor staining.

To see more of our wonderful Antique and Vintage Apothecary & Chemistry Items please click the link below.

Sku# 4608
© 2012-2022 RiverRat Antiques, LLC all rights reserved.

Shipping & Policies

Payment Methods

  • Accepts Etsy gift cards


Payment is due at time of sale. Please if you think you will need additional time or additional payment options please contact us before you place your order.
We except PayPal and all major credit cards.
We also accept payment by mail Money Order or Personal check, once your payment is received and clears our bank we will ship your purchase promptly.

Please proceed to checkout to see all payment options

Thank you
RiverRat Antiques LLC

Shipping from United States

RiverRat Antiques now offers free shipping to the Continental USA on most items.
Our free shipping does not include Alaska or Hawaii or any outlining territories. If you are in one of these areas, please contact us for a shipping quote.

Shipping: We ship most item via USPS, we also use UPS and FedEx. When shipping via UPS or FedEx we can not ship to a PO Box.

Domestic shipments will ship within 1-2 days using the lowest rate possible, usually Priority Mail with tracking.

International shipments will ship within 1-2 days using the lowest rate possible and with tracking if applicable, most international services do not offer tracking.

International Customers, if you would like a quote on shipping costs please contact us.


Returns & Exchanges

I don't accept returns, exchanges, or cancellations

But please contact me if you have any problems with your order.

Returns and exchange details

We do not accept returns, but we do want all our customers to be completely satisfied with their purchase, so if you feel you have been wronged or mislead in your purchase PLEASE let us know Immediately and we will try and make things right.

Thank you
RiverRat Antiques LLC

Legal imprint